Location-Allocation service

Location-allocation helps you choose which facilities from a set of facilities to operate based on their potential interaction with demand points. It can help you answer questions like the following:

In these examples, facilities would represent the fire stations, retail stores, and factories; demand points would represent buildings, customers, and distribution centers.

The objective may be to minimize the overall distance between demand points and facilities, maximize the number of demand points covered within a certain distance of facilities, maximize an apportioned amount of demand that decays with increasing distance from a facility, or maximize the amount of demand captured in an environment of friendly and competing facilities.

Request URL

This service uses the asynchronous execution mode. When using the asynchronous execution mode, the client must periodically check whether the service has finished execution and, once completed, get the result. While the service is executing, the application is available to do other things.

CautionCaution:

The maximum time an application can use the location-allocation service is 1 hour (3,600 seconds). If your request does not complete within this time limit, it will time out and return a failure.

You can make a request to the location-allocation service using the following form:

http://logistics.arcgis.com/arcgis/rest/services/World/LocationAllocation/GPServer/SolveLocationAllocation/submitJob?parameters

Dive-inDive-in:

The service works in all of the supported countries listed in the data coverage page. One or more countries are grouped together to form a region. When you pass in your inputs, the service can examine their geographic locations and try to determine the region in which the analysis should be performed.

All input features need to fall within one region.

Request parameters

The location-allocation request takes the parameters listed below. The only required parameters are facilities, demand_points, token, and f. The optional parameters have default values that are used when not specified in the request.

Required parameters

facilities

Use this parameter to specify one or more locations that serve as facilities. This services chooses the best facility or facilities to serve the demand points.

CautionCaution:

The service imposes a maximum limit of 1,000 points that can be passed as facilities. If the value is exceeded, the response returns an error message.

The facilities parameter can be specified using a JSON structure that represents a set of point features. The JSON structure can include the following properties:

  • url: Specify a REST query request to any ArcGIS Server feature, map, or geoprocessing service that returns a JSON feature set. This property is optional. However, either features or url must be specified.
  • spatialReference: Specifies the spatial reference for the input point geometries. This property is not required if the coordinates are in the default spatial reference, WGS84. If the coordinates are in a different spatial reference, you need to specify the spatial reference's well-known ID (WKID). Depending on whether your input points are specified with a geographic or projected coordinate system, you can find the appropriate WKID in either the geographic coordinate system or projected coordinate system reference topic.

  • fields: Lists the fields that are part of the input features representing facilities. This property is optional if you are using the default fields only. However, it is required if your facilities include custom fields.
  • features: Specify an array of features. This property is optional. However, either the features or url property must be specified.

Each feature in the features array represents a facility and contains the following properties:

  • geometry: Specifies the facility's geometry as a point containing x and y properties.
  • attributes: Specify each attribute as a key-value pair where the key is the name of a given field, and the value is the attribute value for the corresponding field.

Attributes for facilities

When specifying the facilities, you can include additional properties for facilities, such as their names or capacities, using attributes. The facilities parameter can be specified with the following attributes:

  • Name: The name of the facility.
  • FacilityType: Specifies whether the facility is a candidate, required, or competitor facility. The attribute value is specified as one of the following integers (use the numeric code, not the name in parentheses):
    • 0 (Candidate)—A facility that may be part of the solution.
    • 1 (Required)—A facility that must be part of the solution
    • 2 (Competitor)—A rival facility that potentially removes demand from your facilities. Competitor facilities are specific to the Maximize Market Share and Target Market Share problem types; they are ignored in other problem types.
  • Weight: The relative weighting of the facility, which is used to rate the attractiveness, desirability, or bias of one facility compared to another.

    For example, a value of 2.0 could capture the preference of customers who prefer, at a ratio of 2 to 1, shopping in one facility over another facility. Factors that potentially affect facility weight include square footage, neighborhood, and age of the building. Weight values other than one are only honored by the Maximize Market Share and Target Market Share problem types; they are ignored in other problem types.

  • Capacity: The Capacity attribute is specific to the Maximize Capacitated Coverage problem type; the other problem types ignore this field.

    Capacity specifies how much weighted demand the facility is capable of supplying. Excess demand won't be allocated to a facility even if that demand is within the facility's default measurement cutoff.

    Any value assigned to the Capacity field overrides the Default_Capacity parameter for the given facility.

  • CurbApproach: Specifies the direction a vehicle may arrive at and depart from the facility. One of the integers listed in Coded value column in the following table must be specified as a value of this attribute. The values in the Setting column are the descriptive names for CurbApproach attribute values that you may have seen when using ArcGIS Network Analyst software.

    Setting

    Coded value

    Description

    Either side of vehicle

    0

    The vehicle can approach or depart the facility in either direction.

    Right side of vehicle
    Approaching the facility so that it is on the right side of the vehicle is allowed.
    Left side of vehicle
    Approaching the facility so that it is on the left side of the vehicle is allowed.

    Right side of vehicle

    1

    When the vehicle approaches or departs the facility, the facility must be on the right side of the vehicle. This is typically used for vehicles like buses that must arrive with the bus stop on the right hand side.

    Right side of vehicle
    Approaching the facility so that it is on the right side of the vehicle is allowed.

    Left side of vehicle

    2

    When the vehicle approaches or departs the facility, the facility must be on the left side of the vehicle. This is typically used for vehicles like buses that must arrive with the bus stop on the left hand side.

    Left side of vehicle
    Approaching the facility so that it is on the right side of the vehicle is allowed.

    The CurbApproach property was designed to work with both kinds of national driving standards: right-hand traffic (United States) and left-hand traffic (United Kingdom). First, consider a facility on the left side of a vehicle. It is always on the left side regardless of whether the vehicle travels on the left or right half of the road. What may change with national driving standards is your decision to approach from the right or left side. For example, if you want to arrive at a facility and not have a lane of traffic between the vehicle and the facility, you would choose Right side of vehicle in the United States but Left side of vehicle in the United Kingdom.

    Right side of vehicle with right-hand traffic.
    With right-hand traffic, the curb approach that leaves the vehicle closest to the stop is Right side of vehicle.
    Left side of vehicle with left-hand traffic
    With left-hand traffic, the curb approach that leaves the vehicle closest to the stop is Left side of vehicle.

Syntax for specifying facilities using a JSON structure for features
{
    "spatialReference": {
        "wkid": <wkid>,
        "latestWkid": <wkid>, 
    },
    "features": [
        {
            "geometry": {
                "x": <x1>,
                "y": <y1>,
            },
            "attributes": {
                "<field1>": <value1_1>,
                "<field2>": <value1_2>
            }
        },
        {
            "geometry": {
                "x": <x2>,
                "y": <y2>,
            },
            "attributes": {
                "<field1>": <value2_1>,
                "<field2>": <value2_2>
            }
        }
    ], 
}
Syntax for specifying facilities using a URL returning a JSON response
{
    "url": "<url>"
}
Example 1: Specifying facilities in the default spatial reference, WGS84, using JSON structure.

The facility geometries are in the default spatial reference, WGS84. Hence, the spatialReference property is not specified. The example also shows how to specify some attributes for the incidents.

{
    "features": [
        {
            "geometry": {
                "y": 51.5254,
                "x": -0.1891
            },
            "attributes": {
                "Name": "Facility 1",
                "ID": "F100045", 
                "Capacity": 100,
                "CurbApproach": 0
            }
        },
        {
            "geometry": {
                "y": 51.5353,
                "x": -0.1744
            },
            "attributes": {
                "Name": "Facility 2",
                "ID": "F100086",
                "Capacity": 150,
                "CurbApproach": 0
            }
        }
    ]
}
Example 2: Specifying facilities in the Web Mercator spatial reference using a JSON structure.

The facility geometries are in the Web Mercator spatial reference and not in the default WGS84 spatial reference. Hence, the spatialReference property is required.

{
    "spatialReference": {
        "wkid": 102100
    },
    "features": [
        {
            "geometry": {
                "y": -5192521.476,
                "x": -2698533.989
            },
            "attributes": {
                "Name": "123 Main St", 
                "ID": "200156",
                "FacilityType": 0
            }
        },
        {
            "geometry": {
                "y": -5191915.261,
                "x": -2697821.094
            },
            "attributes": {
                "Name": "845 Cypress Ave",
                "ID": "300242",
                "FacilityType": 0
            }
        }
    ]
}
Example 3: Specifying facilities using URL.

The URL makes a query for a few features from a map service. A URL querying features from a feature service can also be specified.

{
    "url": "http://sampleserver6.arcgisonline.com/arcgis/rest/services/NetworkAnalysis/SanDiego/MapServer/21/query?where=1%3D1&outFields=Name&f=json"
}

demand_points

Use this parameter to specify one or more demand points. The tool chooses the best facilities based in large part on how they serve the demand points specified here.

CautionCaution:

The service imposes a maximum limit of 10,000 points that can be passed as demand points. If the value is exceeded, the response returns an error message.

The demand_points parameter can be specified using a JSON structure that represents a set of point features. The JSON structure can include the following properties:

  • url: Specify a REST query request to any ArcGIS Server feature, map, or geoprocessing service that returns a JSON feature set. This property is optional. However, either features or url must be specified.
  • spatialReference: Specifies the spatial reference for the input point geometries. This property is not required if the coordinates are in the default spatial reference, WGS84. If the coordinates are in a different spatial reference, you need to specify the spatial reference's well-known ID (WKID). Depending on whether your input points are specified with a geographic or projected coordinate system, you can find the appropriate WKID in either the geographic coordinate system or projected coordinate system reference topic.

  • features: Specify an array of features. This property is optional. However, either the features or url property must be specified.

Each feature in the features array represents a demand point and contains the following properties:

  • geometry: Specifies the demand point's geometry as a point containing x and y properties.
  • attributes: Specify each attribute as a key-value pair where the key is the name of a given field, and the value is the attribute value for the corresponding field.

Attributes for demand points

When specifying the demand points, you can include additional properties for demand points, such as their names or capacities, using attributes. The demand points parameter can be specified with the following attributes:

  • Name: The name of the demand point.

  • GroupName: The name of the group the demand point is part of. This attribute is ignored for the maximize capacitated coverage, target market share, and maximize market share problem types.

    If demand points share a group name, the task allocates all members of the group to the same facility. (If constraints, such as a cutoff distance, prevent any of the demand points in the group from reaching the same facility, none of the demand points are allocated.)

    Minimize distance without group names
    Minimizing distance without grouped demand points.
    Minimize distance with group names
    Minimizing distance with grouped demand points. In this example, the yellow demand points have the same GroupName value, so they are allocated to the same facility.

  • Weight: The relative weighting of the demand point. A value of 2.0 means the demand point is twice as important as one with a weight of 1.0. If demand points represent households, weight could indicate the number of people in each household.

  • TimeCutoff: The demand point can't be allocated to a facility that is beyond the travel time indicated here. By setting this value, the demand point overrides the value of the default_measurement_cutoff parameter.

    The units for this attribute value are specified by the measurement_units parameter. The attribute value is referenced during the analysis only when the measurement units are time based. The default value is null, which means there isn't an override cutoff.

  • DistanceCutoff:

    The demand point can't be allocated to a facility that is beyond the travel distance indicated here. By setting this value, the demand point overrides the value of the default_measurement_cutoff parameter.

    The units for this attribute value are specified by the measurement_units parameter. The attribute value is referenced during the analysis only when the measurement units are distance based. The default value is null, which means there isn't an override cutoff.

  • CurbApproach: Specifies the direction a vehicle may arrive at or depart from the demand point. One of the integers listed in Coded value column in the following table must be specified as a value of this attribute. The values in the Setting column are the descriptive names for CurbApproach attribute values that you may have seen when using ArcGIS Network Analyst software.

    Setting

    Coded value

    Description

    Either side of vehicle

    0

    The vehicle can approach or depart the demand point in either direction.

    Right side of vehicle
    Approaching the demand point so that it is on the right side of the vehicle is allowed.
    Left side of vehicle
    Approaching the demand point so that it is on the left side of the vehicle is allowed.

    Right side of vehicle

    1

    When the vehicle approaches or departs the demand point, the demand point must be on the right side of the vehicle. This is typically used for vehicles like buses that must arrive with the bus stop on the right hand side.

    Right side of vehicle
    Approaching the demand point so that it is on the right side of the vehicle is allowed.

    Left side of vehicle

    2

    When the vehicle approaches or departs the demand point, the demand point must be on the left side of the vehicle. This is typically used for vehicles like buses that must arrive with the bus stop on the left hand side.

    Left side of vehicle
    Approaching the demand point so that it is on the right side of the vehicle is allowed.

    The CurbApproach property was designed to work with both kinds of national driving standards: right-hand traffic (United States) and left-hand traffic (United Kingdom). First, consider a demand point on the left side of a vehicle. It is always on the left side regardless of whether the vehicle travels on the left or right half of the road. What may change with national driving standards is your decision to approach from the right or left side. For example, if you want to arrive at a demand point and not have a lane of traffic between the vehicle and the demand point, you would choose Right side of vehicle in the United States but Left side of vehicle in the United Kingdom.

    Right side of vehicle with right-hand traffic.
    With right-hand traffic, the curb approach that leaves the vehicle closest to the stop is Right side of vehicle.
    Left side of vehicle with left-hand traffic
    With left-hand traffic, the curb approach that leaves the vehicle closest to the stop is Left side of vehicle.

Syntax for specifying demand points using a JSON structure for features
{
    "spatialReference": {
        "wkid": <wkid>,
        "latestWkid": <wkid>, 
    },
    "features": [
        {
            "geometry": {
                "x": <x1>,
                "y": <y1>,
            },
            "attributes": {
                "<field1>": <value1_1>,
                "<field2>": <value1_2>
            }
        },
        {
            "geometry": {
                "x": <x2>,
                "y": <y2>,
            },
            "attributes": {
                "<field1>": <value2_1>,
                "<field2>": <value2_2>
            }
        }
    ], 
}
Syntax for specifying demand points using a URL returning a JSON response
{
    "url": "<url>"
}
Example 1: Specifying demand points in the default spatial reference, WGS84, using JSON structure.

The demand point geometries are in the default spatial reference, WGS84. Hence, the spatialReference property is not specified. The example also shows how to specify some attributes for the demand points.

{
    "features": [
        {
            "geometry": {
                "y": 51.5254,
                "x": -0.1891
            },
            "attributes": {
                "Name": "Customer 1",
                "ID": "C00001", 
                "Weight": 10,
                "CurbApproach": 0
            }
        },
        {
            "geometry": {
                "y": 51.5353,
                "x": -0.1744
            },
            "attributes": {
                "Name": "Customer 2",
                "ID": "C00002",
                "Weight": 7,
                "CurbApproach": 1
            }
        }
    ]
}
Example 2: Specifying demand points in the Web Mercator spatial reference using a JSON structure.

The demand point geometries are in the Web Mercator spatial reference and not in the default WGS84 spatial reference. Hence, the spatialReference property is required.

{
    "spatialReference": {
        "wkid": 102100
    },
    "features": [
        {
            "geometry": {
                "y": -5192521.476,
                "x": -2698533.989
            },
            "attributes": {
                "Name": "Patron 1",
                "ID": "P1", 
                "TimeCutoff": 10,
            }
        },
        {
            "geometry": {
                "y": -5191915.261,
                "x": -2697821.094
            },
            "attributes": {
                "Name": "Patron 2",
                "ID": "P2",
                "TimeCutoff": 15,
            }
        }
    ]
}
Example 3: Specifying demand points using a URL.

The URL makes a query for a few features from a map service. A URL querying features from a feature service can also be specified.

{
    "url": "http://sampleserver6.arcgisonline.com/arcgis/rest/services/NetworkAnalysis/SanDiego/MapServer/21/query?where=1%3D1&outFields=Name&f=json"
}

token

Use this parameter to specify a token that provides the identity of a user that has the permissions to access the service. Accessing services provided by Esri provides more information on how such an access token can be obtained.

f

Use this parameter to specify the response format. Choose either json or pjson, for example, f=json. The pjson value is used for printing the JSON response in a pretty format.

Optional parameters

travel_mode

Choose the mode of transportation for the analysis.

Travel modes are managed in ArcGIS Online and can be configured by the administrator of your organization to better reflect your organization's workflows. You need to specify the JSON object containing the settings for a travel mode supported by your organization. To get a list of supported travel modes, execute the GetTravelModes tool from the Utilities service.

The value for the travel_mode parameter should be a JSON object representing travel mode settings. When you use the GetTravelModes tool from the Utlities service, You get a string representing the travel mode JSON. You need to convert this string to a valid JSON object using your API and then pass the JSON object as the value for the travel_mode parameter.

For example, below is a string representating the Walking Time travel mode as returned by the GetTravelModes tool.

"{\"attributeParameterValues\": [{\"parameterName\": \"Restriction Usage\", \"attributeName\": \"Walking\", \"value\": \"PROHIBITED\"}, {\"parameterName\": \"Restriction Usage\", \"attributeName\": \"Preferred for Pedestrians\", \"value\": \"PREFER_LOW\"}, {\"parameterName\": \"Walking Speed (km/h)\", \"attributeName\": \"WalkTime\", \"value\": 5}], \"description\": \"Follows paths and roads that allow pedestrian traffic and finds solutions that optimize travel time. The walking speed is set to 5 kilometers per hour.\", \"impedanceAttributeName\": \"WalkTime\", \"simplificationToleranceUnits\": \"esriMeters\", \"uturnAtJunctions\": \"esriNFSBAllowBacktrack\", \"restrictionAttributeNames\": [\"Preferred for Pedestrians\", \"Walking\"], \"useHierarchy\": false, \"simplificationTolerance\": 2, \"timeAttributeName\": \"WalkTime\", \"distanceAttributeName\": \"Miles\", \"type\": \"WALK\", \"id\": \"caFAgoThrvUpkFBW\", \"name\": \"Walking Time\"}"

The above value should be converted to a valid JSON object and passed as the value for the travel_mode parameter

travel_mode={"attributeParameterValues":[{"parameterName":"Restriction Usage","attributeName":"Walking","value":"PROHIBITED"},{"parameterName":"Restriction Usage","attributeName":"Preferred for Pedestrians","value":"PREFER_LOW"},{"parameterName":"Walking Speed (km/h)","attributeName":"WalkTime","value":5}],"description":"Follows paths and roads that allow pedestrian traffic and finds solutions that optimize travel time. The walking speed is set to 5 kilometers per hour.","impedanceAttributeName":"WalkTime","simplificationToleranceUnits":"esriMeters","uturnAtJunctions":"esriNFSBAllowBacktrack","restrictionAttributeNames":["Preferred for Pedestrians","Walking"],"useHierarchy":false,"simplificationTolerance":2,"timeAttributeName":"WalkTime","distanceAttributeName":"Miles","type":"WALK","id":"caFAgoThrvUpkFBW","name":"Walking Time"}

The default value,Custom, allows you to configure your own travel mode. When you pass in Custom, you can set values for the following parameters impedance, uturn_at_junctions, use_hierarchy, restrictions, and attribute_parameter_values.

The default values of the custom travel mode parameters model travelling by car. You may want to choose Custom and set the custom travel mode parameters listed above to model a pedestrian with a fast walking speed or a truck with a given height, weight, and cargo of certain hazardous materials. You may choose to do this to try out different settings to get desired analysis results. Once you have identified the analysis settings, you should work with your organization's administrator and save these settings as part of new or existing travel mode so that everyone in your organization can rerun the analysis with the same settings.

CautionCaution:

When the travel_mode parameter is not set to Custom, this means you are choosing a travel mode configured by your organization, and the service automatically overrides the values of other parameters with values that model the chosen travel mode. The following parameters are overridden:impedance, uturn_at_junctions, use_hierarchy, restrictions, and attribute_parameter_values.

If you set travel_mode to Custom, the service honors the default or user-defined values for the related parameters (impedance, uturn_at_junctions, use_hierarchy, restrictions, and attribute_parameter_values) so you can create your own travel mode.

measurement_units

Specify the units that should be used to measure the travel times or travel distances between demand points and facilities. The task chooses the best facilities based on which ones can reach, or be reached by, the most amount of weighted demand with the least amount travel.

The output allocation lines report travel distance or travel time in different units, including the units you specify for this parameter. The choices are:

  • Meters
  • Kilometers
  • Feet
  • Yards
  • Miles
  • Nautical Miles
  • Seconds
  • Minutes
  • Hours
  • Days

analysis_region

Specify the region in which to perform the analysis. If a value is not specified for this parameter, the tool will automatically calculate the region name based on the location of the input points. Setting the name of the region is recommended to speed up the tool execution. To specify a region, use one of the following values:

  • Europe
  • Greece
  • India
  • Japan
  • Korea
  • MiddleEastAndAfrica
  • NorthAmerica
  • Oceania
  • SouthAmerica
  • SouthAsia
  • SouthEastAsia
  • Taiwan
  • Thailand

The data coverage page lists the countries that are grouped into each of these regions.

problem_type

Specifies the objective of the location-allocation analysis, which can be one of the following options. The default objective is to minimize impedance.

  • Minimize Impedance:

    Minimize Impedance problem type
    Minimize Impedance chooses facilities such that the sum of weighted impedances (demand allocated to a facility multiplied by the impedance to the facility) is minimized.

    This is also known as the P-Median problem type. Facilities are located such that the sum of all weighted travel time or distance between demand points and solution facilities is minimized. (Weighted travel is the amount of demand allocated to a facility multiplied by the travel distance or time to the facility.)

    This problem type is traditionally used to locate warehouses, because it can reduce the overall transportation costs of delivering goods to outlets. Since Minimize Impedance reduces the overall distance the public needs to travel to reach the chosen facilities, the minimize impedance problem without an impedance cutoff is ordinarily regarded as more equitable than other problem types for locating some public-sector facilities such as libraries, regional airports, museums, department of motor vehicles offices, and health clinics.

    The following list describes how the minimize impedance problem type handles demand:

    • A demand point that cannot reach any facilities, due to setting a cutoff distance or time, is not allocated.
    • A demand point that can only reach one facility has all its demand weight allocated to that facility.
    • A demand point that can reach two or more facilities has all its demand weight allocated to the nearest facility only.

  • Maximize Coverage:

    Maximize Coverage problem type
    Maximize Coverage chooses facilities such that as much demand as possible is covered by the impedance cutoff of facilities. In this graphic, the task was directed to choose three facilities.

    Facilities are located such that as much demand as possible is allocated to solution facilities within the impedance cutoff.

    Maximize Coverage is frequently used to locate fire stations, police stations, and ERS centers, because emergency services are often required to arrive at all demand points within a specified response time. Note that it is important for all organizations, and critical for emergency services, to have accurate and precise data so that analysis results correctly model real-world results.

    Pizza delivery businesses, as opposed to eat-in pizzerias, try to locate stores where they can cover the most people within a certain drive time. People who order pizzas for delivery don't typically worry about how far away the pizzeria is; they are mainly concerned with the pizza arriving within an advertised time window. Therefore, a pizza-delivery business would subtract pizza-preparation time from their advertised delivery time and solve a maximize coverage problem to choose the candidate facility that would capture the most potential customers in the coverage area. (Potential customers of eat-in pizzerias are more affected by distance, since they need to travel to the restaurant; thus, the attendance maximizing or market share problem types would better suit eat-in restaurants.)

    The following list describes how the Maximize Coverage problem handles demand:

    • A demand point that cannot reach any facilities due to cutoff distance or time is not allocated.
    • A demand point that can only reach one facility has all its demand weight allocated to that facility.
    • A demand point that can reach two or more facilities has all its demand weight allocated to the nearest facility only.

  • Maximize Capacitated Coverage:

    Maximize Capacitated Coverage problem type
    Maximize Capacitated Coverage chooses facilities such that all or the greatest amount of demand can be served without exceeding the capacity of any facility. In this graphic, each facility has a capacity of one, and the task was directed to choose three facilities. Although the demand point on the bottom of the map is within the impedance cutoff of a facility, it's not allocated, because doing so would surpass a facility's capacity.

    Facilities are located such that all or the greatest amount of demand can be served without exceeding the capacity of any facility.

    Maximize Capacitated Coverage behaves like either the Minimize Impedance or Maximize Coverage problem type but with the added constraint of capacity. You can specify a capacity for an individual facility by assigning a numeric value to its corresponding Capacity attribute on the input facilities. If the Capacity attribute value is null, the facility is assigned a capacity from the default_capacity property.

    Use-cases for Maximize Capacitated Coverage include creating territories that encompass a given number of people or businesses, locating hospitals or other medical facilities with a limited number of beds or patients who can be treated, or locating warehouses whose inventory isn't assumed to be unlimited.

    The following list describes how the Maximize Capacitated Coverage problem handles demand:

    • Unlike Maximize Coverage, Maximize Capacitated Coverage doesn't require a value for the Default Measurement Cutoff; however, when an cutoff is specified, any demand point outside the cutoff time or distance of all facilities is not allocated.
    • An allocated demand point has all or none of its demand weight assigned to a facility; that is, demand isn't apportioned with this problem type.
    • If the total demand that can reach a facility is greater than the capacity of the facility, only the demand points that maximize total captured demand and minimize total weighted travel are allocated.
      NoteNote:

      You may notice an apparent inefficiency when a demand point is allocated to a facility that isn't the nearest solution facility. This may occur when demand points have varying weights and when the demand point in question can reach more than one facility. This kind of result indicates the nearest solution facility didn't have adequate capacity for the weighted demand, or the most efficient solution for the entire problem required one or more local inefficiencies. In either case, the solution is correct.

  • Minimize Facilities:

    Minimize Facilities problem type
    Minimize Facilities chooses facilities such that as many demand points as possible are within the impedance cutoff of facilities. Additionally, the number of facilities required to cover all demand points is minimized. In this graphic, the task was able to cover all demand points with only two facilities.

    Facilities are chosen such that as much weighted demand as possible are allocated to solution facilities within the travel time or distance cutoff; additionally, the number of facilities required to cover demand is minimized.

    Minimize Facilities is the same as Maximize Coverage but with the exception of the number of facilities to locate, which in this case is determined by the solver. When the cost of building facilities is not a limiting factor, the same kinds of organizations that use Maximize Coverage (emergency response, for instance) use Minimize Facilities so that all possible demand points will be covered.

    The following list describes how the Minimize Facilities problem handles demand:

    • A demand point that cannot reach any facilities due to a cutoff distance or time is not allocated.
    • A demand point that can only reach one facility has all its demand weight allocated to that facility.
    • A demand point that can reach two or more facilities has all its demand weight allocated to the nearest facility only.

  • Maximize Attendance:

    Maximize Attendance problem type
    Maximize Attendance chooses facilities such that as much demand weight as possible is allocated to facilities while assuming the demand weight decreases with distance. The demand points, represented by pie charts in this graphic, show how much of their total demand is captured by the facility.

    Facilities are chosen such that as much demand weight as possible is allocated to facilities while assuming the demand weight decreases in relation to the distance between the facility and the demand point.

    Specialty stores that have little or no competition benefit from this problem type, but it may also be beneficial to general retailers and restaurants that don't have the data on competitors necessary to perform market share problem types. Some businesses that might benefit from this problem type include coffee shops, fitness centers, dental and medical offices, and electronics stores. Public transit bus stops are often chosen with the help of Maximize Attendance. Maximize Attendance assumes that the farther people have to travel to reach your facility, the less likely they are to use it. This is reflected in how the amount of demand allocated to facilities diminishes with distance.

    The following list describes how the Maximize Attendance problem handles demand:

    • A demand point that cannot reach any facilities due to a cutoff distance or time is not allocated.
    • When a demand point can reach a facility, its demand weight is only partially allocated to the facility. The amount allocated decreases as a function of the maximum cutoff distance (or time) and the travel distance (or time) between the facility and the demand point.
    • The weight of a demand point that can reach more than one facility is proportionately allocated to the nearest facility only.

  • Maximize Market Share:

    Maximize Market Share problem type
    Maximize Market Share chooses facilities such that the largest amount of allocated demand is captured in the presence of competitors. You specify the number of facilities you want it to choose.

    A specific number of facilities are chosen such that the allocated demand is maximized in the presence of competitors. The goal is to capture as much of the total market share as possible with a given number of facilities, which you specify. The total market share is the sum of all demand weight for valid demand points.

    The market share problem types require the most data because, along with knowing your own facilities' weight, you also need to know that of your competitors' facilities. The same types of facilities that use the Maximize Attendance problem type can also use market share problem types given that they have comprehensive information that includes competitor data. Large discount stores typically use Maximize Market Share to locate a finite set of new stores. The market share problem types use a Huff model, which is also known as a gravity model or spatial interaction.

    The following list describes how the Maximize Market Share problem handles demand:

    • A demand point that cannot reach any facilities due to a cutoff distance or time is not allocated.
    • A demand point that can only reach one facility has all its demand weight allocated to that facility.
    • A demand point that can reach two or more facilities has all its demand weight allocated to them; furthermore, the weight is split among the facilities proportionally to the facilities' attractiveness (facility weight) and inversely proportional to the distance between the facility and demand point. Given equal facility weights, this means more demand weight is assigned to near facilities than far facilities.

    • The total market share, which can be used to calculate the captured market share, is the sum of the weight of all valid demand points.

  • Target Market Share:

    Target Market Share problem type
    Target Market Share works in the presence of competitors and tries to choose the fewest facilities necessary to capture the market share that you specify.

    Target Market Share chooses the minimum number of facilities necessary to capture a specific percentage of the total market share in the presence of competitors. The total market share is the sum of all demand weight for valid demand points. You set the percent of the market share you want to reach and let the solver choose the fewest number of facilities necessary to meet that threshold.

    The market share problem types require the most data because, along with knowing your own facilities' weight, you also need to know that of your competitors' facilities. The same types of facilities that use the Maximize Attendance problem type can also use market share problem types given that they have comprehensive information that includes competitor data.

    Large discount stores typically use the Target Market Share problem type when they want to know how much expansion would be required to reach a certain level of the market share or see what strategy would be needed just to maintain their current market share given the introduction of new competing facilities. The results often represent what stores would like to do if budgets weren't a concern. In other cases where budget is a concern, stores revert to the Maximize Market Share problem and simply capture as much of the market share as possible with a limited number of facilities.

    The following list describes how the target market share problem handles demand:

    • The total market share, which is used in calculating the captured market share, is the sum of the weight of all valid demand points.
    • A demand point that cannot reach any facilities due to a cutoff distance or time is not allocated.
    • A demand point that can only reach one facility has all its demand weight allocated to that facility.
    • A demand point that can reach two or more facilities has all its demand weight allocated to them; furthermore, the weight is split among the facilities proportionally to the facilities' attractiveness (facility weight) and inversely proportional to the distance between the facility and demand point. Given equal facility weights, this means more demand weight is assigned to near facilities than far facilities.

number_of_facilities_to_find

Specify the number of facilities the task should choose. The default value is 1.

The facilities with a FacilityType attribute value of 1 (Required) are always chosen first. Any excess facilities to choose are picked from candidate facilities, which have a FacilityType attribute value of 2.

If the number of facilities to find is less than the number of required facilities, an error occurs.

The number_of_facilities_to_find parameter is ignored for the Minimize Facilities and Target Market Share problem types since the task determines the minimum number of facilities needed to meet the objectives.

default_measurement_cutoff

Specifies the maximum travel time or distance allowed between a demand point and the facility it is allocated to. If a demand point is outside the cutoff of a facility, it cannot be allocated to that facility.

The default value is none, which means travel isn't limited.

The units for this parameter are the same as those specified by the measurement_units parameter.

The travel time or distance is measured by the shortest path along roads.

This property might be used to model the maximum distance that people are willing to travel to visit stores or the maximum time that is permitted for a fire department to reach anyone in the community.

Note that demand points have TimeCutoff and DistanceCutoff attributes, which, if set accordingly, overrides the default_measurement_cutoff parameter. You might find that people in rural areas are willing to travel up to 10 miles to reach a facility while urbanites are only willing to travel up to two miles. Assuming measurement_units is set to miles, you can model this behavior by setting the default_measurement_cutoff to 10 and the DistanceCutoff attribute value of the demand points in urban areas to 2.

default_capacity

This parameter is specific to the Maximize Capacitated Coverage problem type and is ignored for all other problem types. It is the default capacity assigned to all facilities in the analysis. You can override the default capacity for a facility by specifying a value in the facility's Capacity attribute.

The default value is 1.

target_market_share

This parameter is specific to the Target Market Share problem type and is ignored for all other problem types. It is the percentage of the total demand weight that you want the chosen and required facilities to capture. The task chooses the minimum number of facilities needed to capture the target market share specified here.

The default value is 10 percent.

measurement_transformation_model

This sets the equation for transforming the network cost between facilities and demand points. This parameter, coupled with impedance_parameter, specifies how severely the network impedance between facilities and demand points influences the task's choice of facilities.

In the following list of transformation options, d refers to demand points and f, facilities. "Impedance" refers to the shortest travel distance or time between two locations. So impedancedf is the shortest-path (time or distance) between demand point d and facility f, and costdf is the transformed travel time or distance between the facility and demand point. Lambda (λ) denotes the impedance parameter. The measurement_units setting determines whether travel time or distance is analyzed.

  • Linear:

    costdf = λ * impedancedf

    The transformed travel time or distance between the facility and the demand point is the same as the time or distance of the shortest path between the two locations. With this option, the impedance parameter (λ) is always set to one. This is the default.

  • Power:

    costdf = impedancedfλ

    The transformed travel time or distance between the facility and the demand point is equal to the time or distance of the shortest path raised to the power specified by the impedance parameter (λ). Use the Power option with a positive impedance parameter to specify higher weight to nearby facilities.

  • Exponential:

    costdf = e(λ * impedancedf)

    The transformed travel time or distance between the facility and the demand point is equal to the mathematical constant e raised to the power specified by the shortest-path network impedance multiplied with the impedance parameter (λ). Use the Exponential option with a positive impedance parameter to specify a very high weight to nearby facilities.

The next set of graphics and tables use Minimize Impedance to demonstrate the potential effects of using different impedance transformations and parameters.

Sample problem to demonstrate the effects of impedance transformations
A sample problem setup using two-mile edges with demand points on the ends and candidate facilities in the middle of the edges

The Linear transformation always uses a parameter value of one, so the cost is unchanged, and facility B minimizes that cost.

Facility

Total cost (Linear)

Solution facility

A

3+3+5=11

B

7+1+1=9

Facility B is chosen.

Comparison of costs using a linear transformation
Sample problem to demonstrate the effects of impedance transformations
Facility B has a lower total transformed cost than facility A when a linear transformation is used.

A Power transformation with a parameter of two amplifies longer distances enough that facility A minimizes cost instead.

Facility

Total cost (Power transformation, λ = 2)

Solution facility

A

32+32+52=43

Facility A is chosen.

B

72+12+12=51

Comparison of costs using a power transformation with a parameter of 2.0
Sample problem to demonstrate the effects of impedance transformations
Facility A has a lower total transformed cost than facility B when a squared power transformation is used.

An exponential transformation with an impedance parameter of 0.02 favors nearby demand points, so facility B is the solution facility in this case. (The graphic is omitted, since it would look the same as the linear transformation graphic.)

Facility

Total cost (Exponential transformation, λ = 0.02)

Solution facility

A

e0.02*3+e0.02*3+e0.02*5=3.23

B

e0.02*7+e0.02*1+e0.02*1=3.19

Facility B is chosen.

Comparison of costs using an exponential transformation with a parameter of 0.02

measurement_transformation_factor

Provides an impedance parameter value (λ) to the equation specified in the impedance_transformation_model parameter. The parameter value is ignored when the impedance transformation is linear. For power and exponential impedance transformations, the value should be nonzero. The default value is 1.

travel_direction

Specify whether to measure travel times or distances from facilities to demand points or from demand points to facilities. The default value is to measure from facilities to demand points.

  • Facility to Demand:

    Direction of travel is from facilities to demand points.

  • Demand to Facility:

    Direction of travel is from demand points to facilities.

Travel times and distances may change based on direction of travel. If going from point A to point B, you may encounter less traffic or have a shorter path, due to one-way streets and turn restrictions, than if you were traveling in the opposite direction. For instance, going from point A to point B may only take 10 minutes, but going the other direction may take 15 minutes. These differing measurements may affect whether demand points can be assigned to certain facilities because of cutoffs or, in problem types where demand is apportioned, affect how much demand is captured.

Fire departments commonly measure from facilities to demand points since they are concerned with the time it takes to travel from the fire station to the location of the emergency. A retail store is more concerned with the time it takes shoppers to reach the store; therefore, stores commonly measure from demand points to facilities.

The travel_direction parameter also determines the meaning of any start time that is provided. See the time_of_day parameter for more information.

time_of_day

Specify whether travel times should consider traffic conditions. To use traffic in the analysis, choose a time-based unit for measurement_units and assign a value to time_of_day. The time_of_day value represents the time at which travel begins, or departs, from the starting locations (facilities or demand points, depending on travel_direction. The time is specified as Unix time (milliseconds since midnight, January 1 1970).

If a time of day is not passed in, the service uses static road speeds based on average historical speeds or posted speed limits. It uses posted speeds in areas where historical traffic information isn't available.

NoteNote:

Traffic is supported only with the driving time impedance or travel mode. It's not supported with trucking.

The service supports two kinds of traffic: typical and live. Typical traffic references travel speeds that are made up of historical averages for each five-minute interval spanning a week. Live traffic retrieves speeds from a traffic feed that processes phone probe records, sensors, and other data sources to record actual travel speeds and predict speeds for the near future.

The Data Coverage page shows the countries Esri currently provides traffic data for.

Typical Traffic:

To ensure the task uses typical traffic in locations where it is available, choose a time and day of the week, and then convert the day of the week to one of the following dates from 1990:

  • Monday—1/1/1990
  • Tuesday—1/2/1990
  • Wednesday—1/3/1990
  • Thursday—1/4/1990
  • Friday—1/5/1990
  • Saturday—1/6/1990
  • Sunday—1/7/1990

Set the time and date as Unix time in milliseconds.

For example, to solve for 1:03 p.m. on Thursdays, set the time and date to 1:03 p.m., 4 January 1990; and convert to milliseconds (1388840580000).

NoteNote:

Although the dates representing days of the week are from 1990, typical traffic is calculated from recent traffic trends—usually over the last several months.

Live Traffic:

To use live traffic when and where it is available, choose a time and date and convert to Unix time.

Esri saves live traffic data for 12 hours and references predictive data extending 12 hours into the future. If the time and date you specify for this parameter is outside the 24-hour time window, or the travel time in the analysis continues past the predictive data window, the task falls back to typical traffic speeds.

NoteNote:

  • The default value is null, which means the effect of changing traffic isn't included in the analysis.
  • This parameter is ignored when measurement_units is set to a distance-based unit.
  • The time zone for time_of_day can be UTC or the time zone or zones in which the points in facilities or demand points are located. Specify time zones with the time_zone_for_time_of_day parameter.
  • All points in facilities need to be in the same time zone when using traffic and travel_direction is set to Demand to Facility.
  • All points in demand_points need to be in the same time zone when using traffic and travel_direction is set to Facility to Demand.

Examples:

  • "time_of_day": 631414980000 // 13:03, 4 January 1990. Typical traffic on Thursdays at 1:03 p.m.
  • "time_of_day": 631731600000 // 17:00, 7 January 1990. Typical traffic on Sundays at 5:00 p.m.
  • "time_of_day": 1413964800000 // 8:00, 22 October 2014. If the current time is between 8:00 p.m., 21 Oct. 2014 and 8:00 p.m., 22 Oct. 2014, live traffic speeds are referenced in the analysis; otherwise, typical traffic speeds are referenced.
  • "time_of_day": 1426674000000 // 10:20, 18 March 2015. If the current time is between 10:20 p.m., 17 Mar. 2015 and 10:20 p.m., 18 Mar. 2015, live traffic speeds are referenced in the analysis; otherwise, typical traffic speeds are referenced.

time_zone_for_time_of_day

Specify the time zone or zones of the time_of_day parameter. There are two options: Geographically Local (default) and UTC.

Geographically Local:

The time_of_day value refers to the time zone in which the input facilities are located, when traveling from demand to facilities, or the time zone of the demand points when traveling from facilities to demand.

Geographically Local Illustration: Setting time_of_day to 9:00 a.m., 4 January 1990 (631443600000 milliseconds); time_zone_for_time_of_day to Geographically Local; and submitting a valid request causes the drive times for points in the Eastern Time Zone to start at 9:00 a.m. (2:00 p.m. UTC).

UTC:

The timeOfDay value refers to Coordinated Universal Time (UTC).

UTC Illustration: Setting time_of_day to 9:00 a.m., 4 January 1990 (631443600000 milliseconds) and time_zone_for_time_of_day to UTC, the start time for points in the Eastern Time Zone is 4:00 a.m. Eastern Time (9:00 a.m. UTC).

NoteNote:

  • All points in facilities need to be in the same time zone when using traffic and travel_direction is set to Demand to Facility.
  • All points in demand_points need to be in the same time zone when using traffic and travel_direction is set to Facility to Demand.
  • This parameter is ignored when measurement_units is set to a distance-based unit.

uturn_at_junctions

Use this parameter to restrict or allow the analysis to make U-turns at junctions.

CautionCaution:

The value of this parameter, regardless of whether you rely on the default or explicitly set a value, is overridden when travel_mode is set to any other value than Custom. The default value for travel_mode is Driving, so unless you set travel_mode to a different value, this parameter value will be overridden.

In order to understand the available parameter values, consider for a moment that a junction is a point where only two streets intersect each other. If three or more streets intersect at a point, it is called as an intersection. A cul-de-sac is a dead-end. The parameter can have the following values:

Parameter Value

Description

Allowed

U-turns are permitted everywhere. Allowing U-turns implies that the vehicle can turn around at a junction or intersection and double back on the same street.

U-turns are allowed
U-turns are permitted at junctions with any number of adjacent streets.

Allowed only at Intersections and Dead Ends

U-turns are prohibited at junctions where exactly two adjacent streets meet.

U-turns allowed only at intersections and dead-ends
U-turns are permitted only at intersections or dead ends.

Allowed only at Dead Ends

U-turns are prohibited at all junctions and interesections and are permitted only at dead ends.

U-turns allowed only at dead-ends
U-turns are permitted only at dead ends.

Not Allowed

U-turns are prohibited at all junctions, intersections, and dead-ends. Note that even when this parameter value is chosen, a route can still make U-turns at stops. If you wish to prohibit U-turns at a stop, you can set its CurbApproach property to the appropriate value (3).

The default value for this parameter is Allowed.

point_barriers

Use this parameter to specify one or more points that act as temporary restrictions or represent additional time or distance that may be required to travel on the underlying streets. For example, a point barrier can be used to represent a fallen tree along a street or time delay spent at a railroad crossing.

CautionCaution:

The service imposes a maximum limit of 250 point barriers. If the value is exceeded, the response returns an error message.

The point_barriers parameter can be specified using a JSON structure that represents a set of features. The JSON structure can include the following properties:

  • url: Specify a REST query request to any ArcGIS Server feature, map, or geoprocessing service that returns a JSON feature set. This property is optional. However, either features or url must be specified.
  • spatialReference: Specifies the spatial reference for the geometries of point barriers. This property is not required if the coordinate values are in the default spatial reference, WGS84. If the coordinate values are in a different spatial reference, you need to specify the well-known ID (WKID) for the spatial reference. See Geographic coordinate systems and Projected coordinate systems to look up WKID values.
  • features: Specify an array of features. This property is optional. However, either the features or url property must be specified.

Each feature in the features array represents a point barrier and contains the following properties:

  • geometry: Specifies the barrier's geometry as a point containing x and y properties.
  • attributes: Specify each attribute as a key-value pair where the key is the name of a given field, and the value is the attribute value for the corresponding field.

Attributes for point_barriers

When specifying the point_barriers parameter you can specify additional information about barriers, such as the barrier type, using attributes. The point_barriers parameter can be specified with the following attributes:

  • Name: The name of the barrier.
  • BarrierType: Specifies whether the point barrier restricts travel completely or adds time or distance when it is crossed. The value for this attribute is specified as one of the following integers:
    • 0 - Prohibits traversing through the barrier. The barrier is referred to as restriction point barrier since it acts as a restriction. This is the default value.
      Two maps demonstrate how a restriction point barrier affects finding the best route.
      The map on the left shows the shortest path between two stops without any restriction point barriers. The map on the right has a road that is blocked by a fallen tree, so the shortest path between the same points is longer.
    • 2 - Traveling through the barrier increases the travel time or distance by the amount specified as the value for Additional_Time or Additional_Distance attributes. This barrier type is referred to as an added cost point barrier.
      Two maps demonstrate how added cost barriers affect finding the best route.
      The map on the left shows the shortest path between two stops without any added cost point barrier. For the map on the right, the travel time from stop one to stop two would be the same whether going around the north end of the block or the south end; however, since crossing railroad tracks incurs a time penalty (modeled with added cost point barriers), the route with only one railroad crossing is chosen. The cost of crossing the barrier is added to the accumulated travel time of the resulting route.
      NoteNote:

      There is no point barrier type with a value of 1 for the BarrierType attribute.

  • Additional_Time: Indicates how much travel time is added when the barrier is traversed. This attribute is applicable only for added-cost barriers and only if the measurement units are time based. The attribute value must be greater than or equal to zero and is specified in the measurement units.
  • Additional_Distance: Indicates how much distance is added when the barrier is traversed. This attribute is applicable only for added-cost barriers and only if the measurement units are distance based. The attribute value must be greater than or equal to zero and is specified in the measurement units.

Syntax for specifying point_barriers using a JSON structure for features
{
    "spatialReference": {
        "wkid": <wkid>,
        "latestWkid": <wkid>, 
    },
    "features": [
        {
            "geometry": {
                "x": <x1>,
                "y": <y1>,
            },
            "attributes": {
                "<field1>": <value11>,
                "<field2>": <value12>
            }
        },
        {
            "geometry": {
                "x": <x2>,
                "y": <y2>,
            },
            "attributes": {
                "<field1>": <value21>,
                "<field2>": <value22>
            }
        }
    ], 
}
Syntax for specifying point_barriers using a URL returning a JSON response
{
    "url": "<url>"
}
Example 1: Specifying an added cost point barrier in the default spatial reference, WGS84, using JSON structure.

This example shows how to use an added cost point barrier to model a 5-minute delay at a railroad crossing. The BarrierType attribute is used to specify the point barrier is of type added cost and the Additional_Time attribute is used to specify the added delay in minutes. The barrier geometries are in the default spatial reference, WGS84. Hence, the spatialReference property is not specified.

{
    "features": [
        {
            "geometry": {
                "x": 37.541479,
                "y": -122.053461
            },
            "attributes": {
                "Name": "Haley St railroad crossing",
                "BarrrierType": 2,
                "Additional_Time": 5
            }
        }
    ]
}
Example 2: Specifying restriction point barriers in the Web Mercator spatial reference using a JSON structure.

This example shows how to use a restriction point barrier to model a road that is blocked by a fallen tree.The barrier's geometry is in the Web Mercator spatial reference and not in the default WGS84 spatial reference. Hence, the spatialReference property is required.

{
    "spatialReference": {
        "wkid": 102100
    },
    "features": [
        {
            "geometry": {
                "y": -13635398.9398,
                "x": 4544699.034400001
            },
            "attributes": {
                "Name": "Fallen tree at 123 Main St", 
                "BarrierType": 0
            }
        }
    ]
}
Example 3: Specifying point barriers using a URL.

The URL makes a query for a few features from a map service. A URL querying features from a feature service can also be specified.

{
    "url": "http://sampleserver6.arcgisonline.com/arcgis/rest/services/NetworkAnalysis/SanDiego/MapServer/21/query?where=1%3D1&outFields=Name&f=json"
}

line_barriers

Use this parameter to specify one or more lines that prohibit travel anywhere the lines intersect the streets. For example, a parade or protest that blocks traffic across several street segments can be modeled with a line barrier. A line barrier can also quickly fence off several roads from being traversed, thereby channeling possible routes away from undesirable parts of the street network.

Two maps demonstrate how a line barrier affects finding a route between two stops.
The map on the left displays the shortest path between two stops. The map on the right shows the shortest path when several streets are blocked by a line barrier.

CautionCaution:

The service imposes a limit on the number of streets you can restrict using the line_barriers parameter. While there is no limit on number of lines you can specify as line barriers, the combined number of streets intersected by all the lines cannot exceed 500. If the value is exceeded, the response returns an error message.

The line_barriers parameter can be specified using a JSON structure that represents a set of features. The JSON structure can include the following properties:

  • url: Specify a REST query request to any ArcGIS Server feature, map, or geoprocessing service that returns a JSON feature set. This property is optional. However, either features or url must be specified.
  • spatialReference: Specifies the spatial reference for the geometries of the barriers. This property is not required if the coordinate values are in the default spatial reference, WGS84. If the coordinate values are in a different spatial reference, you need to specify the well-known ID (WKID) for the spatial reference. See Geographic coordinate systems and Projected coordinate systems to look up WKID values.
  • features: Specify an array of features. This property is optional. However, either the features or url property must be specified.

Each feature in the features array represents a line barrier and contains the following properties:

  • geometry: Specifies the barrier's geometry. The structure is based on ArcGIS REST polyline object. A polyline contains an array of paths. Each path is represented as an array of points, and each point in the path is represented as an array of numbers containing X and Y coordinate values at index 0 and 1 respectively.
  • attributes: Specify each attribute as a key-value pair where the key is the name of a given field, and the value is the attribute value for the corresponding field.

Attributes for line_barriers

The line_barriers parameter can be specified with the following attributes:

  • Name: The name of the line barrier.

Syntax for specifying line barriers using a JSON structure for features
{
    "spatialReference": {
        "wkid": <wkid>,
        "latestWkid": <wkid>, 
    },
    "features": [
        {
            "geometry": {
                "paths": [
                    [
                        [
                            <x11>,
                            <y11>
                        ],
                        [
                            <x12>,
                            <y12>
                        ]
                    ],
                    [
                        [
                            <x21>,
                            <y21>
                        ],
                        [
                            <x22>,
                            <y22>
                        ]
                    ]
                ]
            },
            "attributes": {
                "<field1>": <value11>,
                "<field2>": <value12>
            }
        },
		{
            "geometry": {
                "paths": [
                    [
                        [
                            <x11>,
                            <y11>
                        ],
                        [
                            <x12>,
                            <y12>
                        ]
                    ],
                    [
                        [
                            <x21>,
                            <y21>
                        ],
                        [
                            <x22>,
                            <y22>
                        ]
                    ]
                ]
            },
            "attributes": {
                "<field1>": <value21>,
                "<field2>": <value22>
            }
        }
    ], 
}
Syntax for specifying line barriers using a URL returning a JSON response
{
    "url": "<url>"
}
Example 1: Specifying line barriers using a JSON structure in Web Mercator spatial reference.

The example shows how to add two lines as line barriers to restrict travel on the streets intersected by the lines. Barrier 1 is a single-part line feature made up of two points. Barrier 2 is a two-part line feature whose first part is made up of three points and whose second part is made up of two points. The barrier geometries are in the Web Mercator spatial reference and not in the default WGS84 spatial reference. Hence, the spatialReference property is required.

{
    "spatialReference": {
        "wkid": 102100
    },
    "features": [
        {
            "geometry": {
                "paths": [
                    [
                        [
                            -10804823.397,
                            3873688.372
                        ],
                        [
                            -10804811.152,
                            3873025.945
                        ]
                    ]
                ]
            },
            "attributes": {
                "Name": "Barrier 1"
            }
        },
        {
            "geometry": {
                "paths": [
                    [
                        [
                            -10804823.397,
                            3873688.372
                        ],
                        [
                            -10804807.813,
                            3873290.911
                        ],
                        [
                            -10804811.152,
                            3873025.945
                        ]
                    ],
                    [
                        [
                            -10805032.678,
                            3863358.76
                        ],
                        [
                            -10805001.508,
                            3862829.281
                        ]
                    ]
                ]
            },
            "attributes": {
                "Name": "Barrier 2"
            }
        }
    ]
}
Example 2: Specifying line barriers using URL.

The URL makes a query for a few features from a map service. A URL querying features from a feature service can also be specified.

{
    "url": "http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Network/USA/MapServer/6/query?where=1%3D1&returnGeometry=true&f=json"
}

polygon_barriers

Use this parameter to specify polygons that either completely restrict travel or proportionately scale the time or distance required to travel on the streets intersected by the polygons.

CautionCaution:

The service imposes a limit on the number of streets you can restrict using the polygon_barriers parameter. While there is no limit on number of polygons you can specify as the polygon barriers, the combined number of streets intersected by all the polygons cannot exceed 2,000. If the value is exceeded, the response returns an error message.

The polygon_barriers parameter can be specified using a JSON structure that represents a set of features. The JSON structure can include the following properties:

  • url: Specify a REST query request to any ArcGIS Server feature, map, or geoprocessing service that returns a JSON feature set. This property is optional. However, either features or url must be specified.
  • spatialReference: Specifies the spatial reference for the geometries of barriers. This property is not required if the coordinate values are in the default spatial reference, WGS84. If the coordinate values are in a different spatial reference, you need to specify the well-known ID (WKID) for the spatial reference. See Geographic coordinate systems and Projected coordinate systems to look up WKID values.
  • features: Specify an array of features. This property is optional. However, either the features or url property must be specified.

Each feature in the features array represents a polygon barrier and contains the following properties:

  • geometry: Specifies the barrier's geometry. The structure is based on ArcGIS REST polygon object. A polygon contains an array of rings. The first point of each ring is always the same as the last point. Each point in the ring is represented as an array of numbers containing X and Y coordinate values at index 0 and 1 respectively.
  • attributes: Specify each attribute as a key-value pair where the key is the name of a given field, and the value is the attribute value for the corresponding field.

Attributes for polygon_barriers

When specifying the polygonBarriers parameter, you can specify additional information about barriers, such as the barrier type, using attributes. The polygon_barriers parameter can be specified with the following attributes:

  • Name: The name of the barrier.
  • BarrierType: Specifies whether the barrier restricts travel completely or scales the time or distance for traveling through it. The value for this attribute is specified as one of the following integers:
    • 0 - Prohibits traveling through any part of the barrier. The barrier is referred to as restriction polygon barrier since it prohibits traveling on streets intersected by the barrier. One use of this type of barrier is to model floods that make traveling on flooded streets impossible. This is the default value.
      Two maps demonstrate how a restriction polygon barrier affects finding a route between two stops.
      The left side depicts the shortest path between two stops. On the right, a polygon barrier blocks flooded streets, so the shortest path between the same two stops is different.
    • 1 - Scales the time or distance required to travel the underlying streets by a factor specified using the ScaledTimeFactor or ScaledDistanceFactor attributes. If the streets are partially covered by the barrier, the travel time or distance is apportioned and then scaled. For example, a factor 0.25 would mean that travel on underlying streets is expected to be four times faster than normal. A factor of 3.0 would mean it is expected to take three times longer than normal to travel on underlying streets. This barrier type is referred to as scaled cost polygon barrier. It might be used to model storms that reduce travel speeds in specific regions.
      Two maps demonstrate how a scaled cost polygon barrier affects finding a route between two stops.
      The map on the left shows a route that goes through inclement weather without regard for the effect poor road conditions have on travel time. On the right, a scaled polygon barrier doubles the travel time of the roads covered by the storm. Notice the route still passes through the southern tip of the storm since it is quicker to spend more time driving slowly through a small part of the storm rather than driving completely around it. The service uses the modified travel time in calculating the best route; furthermore, the modified travel time is reported as the total travel time in the response.
  • ScaledTimeFactor: This is the factor by which the travel time of the streets intersected by the barrier is multiplied. This attribute is applicable only to scaled-cost barriers whose measurement units are time based. The attribute value must be greater than zero. The default value is 1.
  • ScaledDistanceFactor: This is the factor by which the distance of the streets intersected by the barrier is multiplied. This attribute is applicable only to scaled-cost barriers whose measurement units are distance based. The attribute value must be greater than zero. The default value is 1.

Syntax for specifying polygon barriers using a JSON structure for features
{
    "spatialReference": {
        "wkid": <wkid>,
        "latestWkid": <wkid>    
    }
    "features": [
        {
            "geometry": {
                "rings": [
                    [
                        [
                            <x11>,
                            <y11>
                        ],
                        [
                            <x12>,
                            <y12>
                        ],
                        ...,
                        [
                            <x11>,
                            <y11>
                        ]
                    ],
                    [
                        [
                            <x21>,
                            <y21>
                        ],
                        [
                            <x22>,
                            <y22>
                        ],
                        ...,
                        [
                            <x21>,
                            <y21>
                        ]
                    ]
                ]
            },
            "attributes": {
                "<field1>": <value11>,
                "<field2>": <value12>
            }
        },
        {
            "geometry": {
                "rings": [
                    [
                        [
                            <x11>,
                            <y11>
                        ],
                        [
                            <x12>,
                            <y12>
                        ],
                        ...,
                        [
                            <x11>,
                            <y11>
                        ]
                    ],
                    [
                        [
                            <x21>,
                            <y21>
                        ],
                        [
                            <x22>,
                            <y22>
                        ],
                        ...,
                        [
                            <x21>,
                            <y21>
                        ]
                    ]
                ]
            },
            "attributes": {
                "<field1>": <value21>,
                "<field2>": <value22>
            }
        }
    ]
}
Syntax for specifying polygon barriers using a URL returning a JSON response
{
    "url": "<url>"
}
Example 1: Specifying polygon barriers using a JSON structure.

The example shows how to add two polygons as barriers. The first polygon named Flood zone is a restriction polygon barrier that prohibits travel on the underlying streets. The polygon is a single-part polygon feature made up of four points. The second polygon named Severe weather zone is a scaled-cost polygon barrier that increases the travel time on underlying streets to one third of the original value. The polygon is a two-part polygon feature. Both parts are made up of four points.

The barrier geometries are in the default spatial reference, WGS84. Hence, the spatialReference property is not required.

{
    "features": [
        {
            "geometry": {
                "rings": [
                    [
                        [
                            -97.0634,
                            32.8442
                        ],
                        [
                            -97.0554,
                            32.84
                        ],
                        [
                            -97.0558,
                            32.8327
                        ],
                        [
                            -97.0638,
                            32.83
                        ],
                        [
                            -97.0634,
                            32.8442
                        ]
                    ]
                ]
            },
            "attributes": {
                "Name": "Flood zone",
                "BarrierType": 0
            }
        },
        {
            "geometry": {
                "rings": [
                    [
                        [
                            -97.0803,
                            32.8235
                        ],
                        [
                            -97.0776,
                            32.8277
                        ],
                        [
                            -97.074,
                            32.8254
                        ],
                        [
                            -97.0767,
                            32.8227
                        ],
                        [
                            -97.0803,
                            32.8235
                        ]
                    ],
                    [
                        [
                            -97.0871,
                            32.8311
                        ],
                        [
                            -97.0831,
                            32.8292
                        ],
                        [
                            -97.0853,
                            32.8259
                        ],
                        [
                            -97.0892,
                            32.8279
                        ],
                        [
                            -97.0871,
                            32.8311
                        ]
                    ]
                ]
            },
            "attributes": {
                "Name": "Severe weather zone",
                "BarrierType": 1,
                "ScaledTimeFactor": 3
            }
        }
    ]
}
Example 2: Specifying a polygon barrier using a URL.

The URL makes a query for a few features from a map service. A URL querying features from a feature service can also be specified.

{
    "url": "http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Network/USA/MapServer/7/query?where=1%3D1&returnGeometry=true&f=json"
}

use_hierarchy

Specify whether hierarchy should be used when finding the shortest paths.

CautionCaution:

The value of this parameter, regardless of whether you rely on the default or explicitly set a value, is overridden when travel_mode is set to any other value than Custom. The default value for travel_mode is Driving, so unless you set travel_mode to a different value, this parameter value will be overridden.

  • true—Use hierarchy when measuring between points. This is the default value. When hierarchy is used, the tool prefers higher-order streets (such as freeways) to lower-order streets (such as local roads), and can be used to simulate the driver preference of traveling on freeways instead of local roads even if that means a longer trip. This is especially true when finding routes to faraway locations, because drivers on long-distance trips tend to prefer traveling on freeways where stops, intersections, and turns can be avoided. Using hierarchy is computationally faster, especially for long-distance routes, since the tool can determine the best route from a relatively smaller subset of streets.

  • false—Do not use hierarchy when measuring between stops. If hierarchy is not used, the tool considers all the streets and doesn't prefer higher-order streets when finding the route. This is often used when finding short-distance routes within a city.

CautionCaution:

The service automatically reverts to using hierarchy if the straight-line distance between the stops is greater than 50 miles (80.46 kilometers), even if you have specified to find the route without using hierarchy.

restrictions

Use this parameter to specify which restrictions should be honored by the service. A restriction represents a driving preference or requirement. In most cases, restrictions cause roads or pathways to be prohibited, but they can also cause them to be avoided or preferred. For instance, using an Avoid Toll Roads restriction will result in a route that will include toll roads only when it is absolutely required to travel on toll roads in order to visit a stop. Height Restriction makes it possible to route around any clearances that are lower than the height of your vehicle. If you are carrying corrosive materials on your vehicle, using the Any Hazmat Prohibited restriction prevents hauling the materials along roads where it is marked as illegal to do so.

CautionCaution:

The value of this parameter, regardless of whether you rely on the default or explicitly set a value, is overridden when travel_mode is set to any other value than Custom. The default value for travel_mode is Driving, so unless you set travel_mode to a different value, this parameter value will be overridden.

The service supports the restriction names listed in the following table:

NoteNote:

Some restrictions are supported only in certain countries as indicated by the Availability column in the table. A restriction is supported in a country if the Logistics Attribute column has a value of Yes in the list of supported countries. If you specify restriction names that are not available in the country where your input points are located, the service ignores the invalid restrictions and returns warning messages indicating the names for the restrictions that were not considered when making measurements.

NoteNote:

Sometimes you need to specify an additional value, the restriction attribute parameter, on a restriction to get the intended results. This value needs to be associated with the restriction name and a restriction parameter using attribute_parameter_values.

Restriction Name

Description

Availability

Any Hazmat Prohibited

The route will exclude roads where transporting any kind of hazardous material is prohibited.

Select countries in North America and Europe

Avoid Carpool Roads

The route will avoid roads designated exclusively for carpool (high-occupancy) vehicles.

All countries

Avoid Express Lanes

The route will avoid roads designated as express lanes.

All countries

Avoid Ferries

The route will avoid ferries.

All countries

Avoid Gates

The route will avoid roads where there are gates, such as keyed-access or guard-controlled entryways.

All countries

Avoid Limited Access Roads

The route will avoid roads designated as limited-access highways.

All countries

Avoid Private Roads

The route will avoid roads that are not publicly owned and maintained.

All countries

Avoid Toll Roads

The route will avoid toll roads.

All countries

Avoid Unpaved Roads

The route will avoid roads that are not paved (for example, dirt, gravel, etc.).

All countries

Avoid Truck Restricted Roads

The route will avoid roads where trucks are not allowed except when making deliveries.

All countries

Axle Count Restriction

The route will not include roads where trucks with the specified number of axles are prohibited. The number of axles can be specified using the Number of Axles restriction parameter.

Select countries in North America and Europe

Driving a Bus

The route will exclude roads where buses are prohibited. Using this restriction also ensures the route will honor one-way streets.

All countries

Driving a Delivery Vehicle

The route will exclude roads where delivery vehicles are prohibited. Using this restriction also ensures the route will honor one-way streets.

All countries

Driving a Taxi

The route will exclude roads where taxis are prohibited. Using this restriction also ensures the route will honor one-way streets.

All countries

Driving a Truck

The route will exclude roads where trucks are prohibited. Using this restriction also ensures the route will honor one-way streets.

All countries

Driving an Automobile

The route will exclude roads where automobiles are prohibited. Using this restriction also ensures the route will honor one-way streets.

All countries

Driving an Emergency Vehicle

The route will exclude roads where emergency vehicles are prohibited. Using this restriction also ensures the route will honor one-way streets.

All countries

Height Restriction

The route will exclude roads where the vehicle height exceeds the maximum allowed height for the road. The vehicle height can be specified using the Vehicle Height (meters) restriction parameter.

Select countries in North America and Europe

Kingpin to Rear Axle Length Restriction

The route will exclude roads where the vehicle kingpin-to-rear-axle length exceeds the maximum allowed for the road. The vehicle's length between the vehicle kingpin and the rear axle can be specified using the Vehicle Kingpin to Rear Axle Length (meters) restriction parameter.

Select countries in North America and Europe

Length Restriction

The route will exclude roads where the vehicle length exceeds the maximum allowed length for the road. The vehicle length can be specified using the Vehicle Length (meters) restriction parameter.

Select countries in North America and Europe

Preferred for Pedestrians

The route prefers paths designated for pedestrians.

All countries

Riding a Motorcycle

The route will exclude roads where motorcycles are prohibited. Using this restriction also ensures the route will honor one-way streets.

All countries

Roads Under Construction Prohibited

The route will exclude roads that are under construction.

All countries

Semi or Tractor with One or More Trailers Prohibited

The route will exclude roads where semis or tractors with one or more trailers are prohibited.

Select countries in North America and Europe

Single Axle Vehicles Prohibited

The route will exclude roads where vehicles with single axles are prohibited.

Select countries in North America and Europe

Tandem Axle Vehicles Prohibited

The route will exclude roads where vehicles with tandem axles are prohibited.

Select countries in North America and Europe

Through Traffic Prohibited

The route will exclude roads where through traffic (non-local) is prohibited.

All countries

Truck with Trailers Restriction

The route will exclude roads where trucks with the specified number of trailers on the truck are prohibited. The number of trailers on the truck can be specified using the Number of Trailers on Truck restriction parameter.

Select countries in North America and Europe

Use Preferred Hazmat Routes

The route will prefer roads designated for transporting any kind of hazardous materials.

Select countries in North America and Europe

Use Preferred Truck Routes

The route will prefer roads designated as truck routes, such as the roads that are part of the national network as specified by the National Surface Transportation Assistance Act in the United States, or roads that are designated as truck routes by the state or province, or or roads in an area that are generally more suitable for trucks.

Select countries in North America and Europe

Walking

The route will exclude roads where pedestrians are prohibited.

All countries

Weight Restriction

The route will exclude roads where the vehicle weight exceeds the maximum allowed weight for the road. The vehicle weight can be specified using the Vehicle Weight (kilograms) restriction parameter.

Select countries in North America and Europe

Weight per Axle Restriction

The route will exclude roads where the vehicle's weight per axle exceeds the maximum allowed for the road. The vehicle's weight per axle can be specified using the Vehicle Weight per Axle (kilograms) restriction parameter.

Select countries in North America and Europe

Width Restriction

The route will roads where the vehicle width exceeds the maximum allowed for the road. The vehicle width can be specified using the Vehicle Width(meters) restriction parameter.

Select countries in North America and Europe

LegacyLegacy:

Driving a Delivery Vehicle restriction attribute is deprecated and will be unavailable in future releases. To achieve similar results, use Driving a Truck restriction attribute along with Avoid Truck Restricted Roads restriction attribute.

The restrictions parameter value is specified as an array of restriction names. The default value for this parameter is restrictions=[Avoid Carpool Roads, Avoid Express Lanes, Avoid Gates, Avoid Private Roads, Avoid Unpaved Roads, Driving an Truck, Use Preferred Truck Routes, Roads Under Construction Prohibited, Through Traffic Prohibited]. A value of null indicates that no restrictions should be used when finding the best route, but only when travel_mode is set to Custom.

Example: restrictions=[Driving an Emergency Vehicle,Height Restriction,Length Restriction]

attribute_parameter_values

Use this parameter to specify additional values required by an attribute or restriction, such as to specify whether the restriction prohibits, avoids, or prefers travel on restricted roads. If the restriction is meant to avoid or prefer roads, you can further specify the degree to which they are avoided or preferred using this parameter.

CautionCaution:

The value of this parameter, regardless of whether you rely on its default or explicitly set a value, is overridden when travel_mode is set to any other value than Custom. The default value for travel_mode is Custom.

The attributes_parameter_values parameter can be specified using a JSON structure that represents a set of features. The JSON structure can include the following properties:

  • url: Specify a REST query request to any ArcGIS Server feature, map, or geoprocessing service that returns a JSON feature set. This property is optional. However, either features or url must be specified.
  • features: Specify an array of features. This property is optional. However, either the features or url property must be specified.

Each feature in the features array represents an attribute parameter and contains the following properties:

  • attributes: Specify each attribute as a key-value pair where the key is the name of a given field, and the value is the attribute value for the corresponding field.
NoteNote:

The JSON structure for the attribute_parameter_values parameter does not have a geometry property.

Attributes for attribute_parameter_values

The attribute_parameter_values parameter can be specified with the following attributes:

  • AttributeName: Lists the name of the restriction.
  • ParameterName: Lists the name of the parameter associated with the restriction. A restriction can have one or more ParameterName values based on its intended use, which implies you may need multiple attribute_parameter_values parameters for a single attribute name.
  • ParameterValue: The value for the ParameterName that is used by the service when evaluating the restriction.

NoteNote:

In most cases, the attribute_parameter_values parameter is dependent on the restrictions parameter. The ParameterValue specified as part of attribute_parameter_values is applicable only if the restriction name is specified as the value for the restrictions parameter.

When specifying the attribute_parameter_values parameter, each restriction (listed as AttributeName) has a ParameterName value, Restriction Usage, that specifies whether the restriction prohibits, avoids, or prefers travel on the roads associated with the restriction and the degree to which the roads are avoided or preferred.

The Restriction Usage ParameterName can be assigned any of the following string values or their equivalent numeric values listed within the parentheses:

  • PROHIBITED (-1)—Travel on the roads using the restriction is completely prohibited.
  • AVOID_HIGH (5)—It is very unlikely for the service to include, in the results, roads that are associated with the restriction.
  • AVOID_MEDIUM (2)—It is unlikely for the service to include, in the results, roads that are associated with the restriction.
  • AVOID_LOW (1.3)—It is somewhat unlikely for the service to include, in the results, roads that are associated with the restriction.
  • PREFER_LOW (0.8)—It is somewhat likely for the service to include, in the results, results roads that are associated with the restriction.
  • PREFER_MEDIUM(0.5)—It is likely for the service to include, in the results, roads that are associated with the restriction.
  • PREFER_HIGH (0.2)—It is very likely for the service to include, in the results, roads that are associated with the restriction.

In most cases, you can use the default value, PROHIBITED, for Restriction Usage if the restriction is dependent on a physical vehicle characteristic, such as vehicle height. However, in some cases, the value for Restriction Usage depends on your travel preferences. For example, the Avoid Toll Roads restriction has the default value of AVOID_MEDIUM for the Restriction Usage parameter. This means that when the restriction is used, the service will try to route around toll roads when it can. AVOID_MEDIUM also indicates how important it is to avoid toll roads when finding the best route; it has a medium priority. Choosing AVOID_LOW would put lower importance on avoiding tolls; choosing AVOID_HIGH instead would give it a higher importance and thus make it more acceptable for the service to generate longer routes to avoid tolls. Choosing PROHIBITED would entirely disallow travel on toll roads, making it impossible for a route to travel on any portion of a toll road. Keep in mind that avoiding or prohibiting toll roads, and thus avoiding toll payments, is the objective for some; in contrast, others prefer to drive on toll roads because avoiding traffic is more valuable to them than the money spent on tolls. In the latter case, you would choose PREFER_LOW, PREFER_MEDIUM, or PREFER_HIGH as the value for Restriction Usage. The higher the preference, the farther the service will go out of its way to travel on the roads associated with the restriction.

The following table lists the restriction names and the default restriction parameter values for all the restrictions. The default value for the attribute_parameter_values parameter is the JSON structure containing all the rows from the table.

TipTip:

If you want to use the default value for any restriction, AttributeName, ParameterName, and ParameterValue do not have to be specified as part of the attribute_parameter_values parameter.

AttributeName

ParameterName

ParameterValue

Any Hazmat Prohibited

Restriction Usage

PROHIBITED

Avoid Carpool Roads

Restriction Usage

AVOID_HIGH

Avoid Express Lanes

Restriction Usage

AVOID_HIGH

Avoid Ferries

Restriction Usage

AVOID_MEDIUM

Avoid Gates

Restriction Usage

AVOID_MEDIUM

Avoid Limited Access Roads

Restriction Usage

AVOID_MEDIUM

Avoid Private Roads

Restriction Usage

AVOID_MEDIUM

Avoid Toll Roads

Restriction Usage

AVOID_MEDIUM

Avoid Truck Restricted Roads

Restriction Usage

AVOID_HIGH

Axle Count Restriction

Number of Axles

0

Restriction Usage

PROHIBITED

Driving a Bus

Restriction Usage

PROHIBITED

Driving a Delivery Vehicle

Restriction Usage

PROHIBITED

Driving a Taxi

Restriction Usage

PROHIBITED

Driving a Truck

Restriction Usage

PROHIBITED

Driving an Automobile

Restriction Usage

PROHIBITED

Driving an Emergency Vehicle

Restriction Usage

PROHIBITED

Height Restriction

Restriction Usage

PROHIBITED

Vehicle Height (meters)

0

Kingpin to Rear Axle Length Restriction

Restriction Usage

PROHIBITED

Vehicle Kingpin to Rear Axle Length (meters)

0

Length Restriction

Restriction Usage

PROHIBITED

Vehicle Length (meters)

0

Riding a Motorcycle

Restriction Usage

PROHIBITED

Roads Under Construction Prohibited

Restriction Usage

PROHIBITED

Semi or Tractor with One or More Trailers Prohibited

Restriction Usage

PROHIBITED

Single Axle Vehicles Prohibited

Restriction Usage

PROHIBITED

Tandem Axle Vehicles Prohibited

Restriction Usage

PROHIBITED

Through Traffic Prohibited

Restriction Usage

AVOID_HIGH

Truck with Trailers Restriction

Restriction Usage

PROHIBITED

Number of Trailers on Truck

0

Use Preferred Hazmat Routes

Restriction Usage

PREFER_MEDIUM

Use Preferred Truck Routes

Restriction Usage

PREFER_HIGH

Walking

Restriction Usage

PROHIBITED

WalkTime

Walking Speed (km/h)

5

Weight Restriction

Restriction Usage

PROHIBITED

Vehicle Weight (kilograms)

0

Weight per Axle Restriction

Restriction Usage

PROHIBITED

Vehicle Weight per Axle (kilograms)

0

Width Restriction

Restriction Usage

PROHIBITED

Vehicle Width (meters)

0

Syntax for specifying attribute_parameter_values
{
    "features": [
        {
            "attributes": {
                "<field1>": <value11>,
                "<field2>": <value12>,
                "<field3>": <value13>

            }
        },
        {
            "attributes": {
                "<field1>": <value21>,
                "<field2>": <value22>,
                "<field3>": <value13>
            }
        }
    ] 
}
Example: Specifying the vehicle height and weight and a high preference to use designated truck routes

This example shows how to specify the height and weight of the vehicle for use with the height and weight restrictions respectively along with a high preference to include designated truck routes. This results in a route that does not include any roads where the clearance under overpasses or through tunnels is less than the vehicle height. The results will also not include any roads with load limited bridges or local roads that prohibit heavy vehicles if the vehicle weight exceeds the maximum permissible weight. However, the route will include as many roads as possible that are designated as preferred truck routes.

Note that the Restriction Usage ParameterName for the Height Restriction and the Weight Restriction restrictions are not specified since we want to use the default value of PROHIBITED for these restriction parameters.

attribute_parameter_values=
{
    "features": [
        {
            "attributes": {
                "AttributeName": "Height Restriction",
                "ParameterName": "Vehicle Height (meters)",
                "ParameterValue": 4.12
            }
        },
        {
            "attributes": {
                "AttributeName": "Weight Restriction",
                "ParameterName": "Vehicle Weight (kilograms)",
                "ParameterValue": 36287
            }
        },
        {
            "attributes": {
                "AttributeName": "Use Preferred Truck Routes",
                "ParameterName": "Restriction Usage",
                "ParameterValue": "PREFER_HIGH"
            }
        }
    ]
}

impedance

Specify the impedance.

CautionCaution:

The value of this parameter, regardless of whether you rely on its default or explicitly set a value, is overridden when travel_mode is set to any other value than Custom. The default value for travel_mode is Custom.

Impedance is a value that quantifies travel along the transportation network. Travel distance is an example of impedance; it quantifies the length of walkways and road segments. Similarly, drive time—the typical time it takes to drive a car along a road segment—is an example of impedance. Drive times may vary by type of vehicle—for instance, the time it takes for a truck to travel along a path tends to be longer than a car—so there can be many impedance values representing travel times for different vehicle types. Impedance values may also vary with time; live and historical traffic reference dynamic impedance values. Each walkway and road segment stores at least one impedance value. When performing a network analysis, the impedance values are used to calculate the best results, such as finding the shortest route—the route that minimizes impedance—between two points.

The impedance parameter can be specified using the following values:

  • Drive Time—Models travel times for a car. These travel times can be dynamic, fluctuating according to traffic flows, in areas where traffic data is available.
  • Truck Time (default)—Models travel times for a truck. These travel times are static for each road and don't fluctuate with traffic.
  • Walk Time—Models travel times for a pedestrian. The default walking speed is 5 kilometers per hour (3.1 miles per hour), but you can change that speed through the attribute_parameter_values parameter by setting Walking Speed (km/h) to a different value.
  • Travel Distance—Stores length measurements along roads and paths. To model walk distance, set impedance to Travel Distance and make sure to pass in the restriction parameter with the Walking restriction, which helps ensure the only paths traveled on allow pedestrian traffic. Similarly, to model car or truck distance, set impedance to Travel Distance and set appropriate values for the restrictions and attribute_parameter_values parameters. This will help ensure your vehicle travels only on roads where it is permitted to do so.

If you pass Drive Time, Truck Time, or Walk Time, the measurement_units parameter must be set to a time-based value; if you set impedance to Travel Distance, measurement_units must be distance-based.

allocation_line_shape

Specify the type of line features that are output by the tool. The parameter accepts one of the following values:

  • Straight Line:

    Return straight lines between solution facilities and the demand points allocated to them. This is the default. Drawing straight lines on a map helps you visualize how demand is allocated.

  • None:

    Return a table containing data about the shortest paths between solution facilities and the demand points allocated to them, but don't return lines.

No matter which value you choose for the allocation_line_shape parameter, the shortest route is always determined by minimizing the travel time or the travel distance, never using the straight-line distance between incidents and facilities. That is, this parameter only changes the output line shapes; it doesn't change the measurement method.

env:outSR

Use this parameter to specify the spatial reference of the geometries, such as the chosen facilities or the allocation lines returned by the service.

The parameter value can be specified as a well-known ID (WKID) for the spatial reference. If env:outSR is not specified, the geometries are returned in the default spatial reference, WGS84. See Geographic coordinate systems and Projected coordinate systems to look up WKID values.

Many of the basemaps provided by ArcGIS Online are in the Web Mercator spatial reference (WKID 102100). Specifying env:outSR=102100 returns the geometries in the Web Mercator spatial reference, which can be drawn on top of the basemaps.

save_output_network_analysis_layer

Use this parameter to specify if the service should save the analysis settings as a network analysis layer file. You cannot directly work with this file even when you open the file in an ArcGIS Desktop application like ArcMap. It is meant to be sent to Esri Technical Support in order to diagnose the quality of results returned from the service.

  • true—Saves network analysis layer file. The file can be downloaded from the URL provided as part of the output_network_analysis_layer parameter.

  • false—Don't save network analysis layer file. This is the default value.

overrides

Specify additional settings that can influence the behavior of the solver when finding solutions for the network analysis problems.

The value for this parameter needs to be specified in JavaScript Object Notation (JSON). The values can be either a number, Boolean, or a string.

{
"overrideSetting1" : "value1", 
"overrideSetting2" : "value2"
}

The default value for this parameter is no value, which indicates not to override any solver settings.

Overrides are advanced settings that should be used only after careful analysis of the results obtained before and after applying the settings. A list of supported override settings for each solver and their acceptable values can be obtained by contacting Esri Technical Support.

JSON response

When you submit a request, the service assigns a unique job ID to the transaction. The job ID and the status of the job are returned in the response.

JSON response syntax from the request
{
    "jobId": <jobID>,
    "jobStatus": <jobStatus>
}

The jobStatus property can have the following values:

You can use the job ID to periodically check the status of the job and messages. Additionally, if the job has successfully completed, you can use the job ID to retrive the results or even the inputs. The job information and results remain available for 24 hours after the job is done.

After the initial request is submitted, you can make a request of the following form to get the status of the job:

https://logistics.arcgis.com/arcgis/rest/services/World/LocationAllocation/GPServer/SolveLocationAllocation/jobs/<yourJobID>/?token=<yourToken>&returnMessages=true&f=pjson
JSON response syntax during job execution
{
    "jobId": "<jobId>",
    "jobStatus": "<jobStatus>",
    "messages": [
        {
            "type": "<type1>",
            "description": "<description1>"
        },
        {
            "type": "<type2>",
            "description": "<description2>"
        }
    ]
}

While a job is executing, you can cancel it by making a request of the following form:

http://logistics.arcgis.com/arcgis/rest/services/World/LocationAllocation/GPServer/SolveLocationAllocation/jobs/<jobID>/cancel?token=<yourToken>&f=pjson

NoteNote:

When you submit your request, if the service is busy processing other requests, the job will wait in the queue. The job status will be reported as esriJobSubmitted. If your application cannot wait for the entire duration while the job is in the queue, you can cancel the request and submit it at a later time. A canceled request will not incur any service credits. However, if your application did not cancel the request, it will eventually execute and will incur service credits irrespective of whether your application retrived the results or ignored them. Therefore, your application should always cancel the request if required.

After the successful completion of the job, you can make a request of the following form to retrieve the outputs. Refer to the Output Parameters section for more information on how to interpret the solution provided by the service.

https://logistics.arcgis.com/arcgis/rest/services/World/LocationAllocation/GPServer/SolveLocationAllocation/jobs/<jobID>/results/output_allocation_lines?token=<yourToken>&f=pjson

You can also retrieve the value for any input parameter by making the requests of the the following form:

http://logistics.arcgis.com/arcgis/rest/services/World/LocationAllocation/GPServer/SolveLocationAllocation/jobs/<jobID>/inputs/<inputParameterName>?token=<yourToken>f=pjson

Output parameters

After successfully executing, the service returns the chosen facilities, participating demand points, connecting lines between demand points and the facilities they were assigned to, and the status of whether the analysis was successful. This information is output in the following output parameters:

output_facilities

Use this parameter to access the chosen facilities as well as any required, competitor, or unchosen candidate facilities. The facility geometries are returned in the spatial reference specified as the env:outSR parameter.

The following list describes the attributes of the output facilities:

  • OID—A unique identifier for the facility. This identifier is automatically generated by the service.
  • Name—The name of the facility.

  • FacilityType—The best facilities, or those that are chosen in the analysis, are indicated in this field. All facility types are as follows:

    • 0 (Candidate)—The service didn't choose the candidate facility to be part of the solution.
    • 1 (Required)—Prior to submitting the analysis, the facility was designated as "required"; therefore, it is part of the solution regardless of how much demand it was able to capture.
    • 2 (Competitor)—The facility is a competitor and any demand it captures is removes potential demand from your facilities. Competitor facilities are specific to the Maximize Market Share and Target Market Share problem types; they are ignored in other problem types.
    • 3 (Chosen)—These are the chosen facilities; that is, candidate facilities that capture the most demand. The number of chosen facilities equals number_of_facilities_to_find minus the number of required facilities.

  • Weight— The relative weighting of the facility, which is used to rate the attractiveness, desirability, or bias of one facility compared to another. The values are copied from the corresponding input facilities.

  • Capacity—The amount of weighted demand the facility is capable of supplying. The values are copied from the corresponding input facilities.

  • DemandCount—A count of demand points allocated to the facility. A nonzero value means the facility was part of the solution, either as a required, competitor, or chosen facility.

  • DemandWeight—A sum of the effective weight from all demand points that were allocated to the facility. The value is a sum of all the Weight values from the demand points that were allocated to the facility. In the case of the Maximize Attendance and Market Share problem types, the value is an apportioned sum of the Weight field values since these problem types allow demand to decay with distance or be split among many facilities.

  • CurbApproach—The direction in which vehicles are allowed to arrive at or depart from the facility. The values are copied from the corresponding input facilities.

  • Status—Indicates how the corresponding input facility was evaluated in the analysis. The possible values are the following:

    • 0 (OK)—The facility was successfully located on the transportation network and analyzed.
    • 1 (Not Located)—A traversable road wasn't within 12.42 miles (20 kilometers) of the facility and therefore was excluded from the analysis.
    • 3 (Invalid Field Values)—Field values fall outside a range or coded-value domain.
    • 4 (Not Reached)—The facility couldn't be reached due to constraints; for example, a curb approach is set so that a vehicle must travel in the wrong direction on a one-way street to reach the facility.

  • Total_[cost] (such as Total_Minutes or Total_Miles)—A sum of travel distance or travel time between the facility and each of the demand points that were allocated to the facility.

  • TotalWeighted_[cost] (such as TotalWeighted_Minutes or TotalWeighted_Miles)—The cumulative weighted travel costs for a facility. The weighted travel cost for a demand point is its weight multiplied by the shortest or quickest path between the facility and the demand point. The weighted cost for a facility is the sum of all the weighted costs of demand points that are allocated to the facility. For example, if a demand point with a weight of two is allocated to a facility 10 miles away, the TotalWeighted_Miles value is 20 (2 x 10). If another demand point with a weight of three is allocated to the same facility and is five miles away, the TotalWeighted_Miles value increases to 35 (3 x 5 + 20).

  • FacilityOID—The object ID value of the corresponding input facility feature.

output_demand_points

Use this parameter to access the demand points that participated in the analysis: both those that were and were not allocated to facilities. The demand-point geometries are returned in the spatial reference specified as the env:outSR parameter.

  • OID—A unique identifier for the demand point. This identifier is automatically generated by the service.
  • Name—The name of the demand point.
  • Weight—The relative weighting of the demand point. The values are copied from the corresponding input demand points.
  • AllocatedWeight—The amount of demand allocated to chosen and required facilities. The value excludes demand allocated to competing facilities. The value can have three interpretations:
    • Null—The demand point wasn't assigned to any facility. This can result, for example, if the demand point could not be reached from any facility.
    • 0—The demand point was only assigned to competing facilities.
    • Positive, nonzero value—Indicates how much demand is assigned to your chosen and required facilities.
  • GroupName—The name of the group that the demand point is a part of. The values are copied from the corresponding input demand points.
  • CurbApproach—The direction in which vehicles are allowed to arrive at or depart from the demand point. The values are copied from the corresponding input demand points.
  • DemandOID—The object ID value of the corresponding input demand point feature.
  • FacilityOID—The object ID value of the corresponding input facility feature.
  • TimeCutoff or DistanceCutoff—The maximum time or distance that the input demand point was allowed to travel to reach a facility. The values is copied from the corresponding input demand points.

output_allocation_lines

Use this parameter to access the lines that connect demand points to the facilities they were allocated to. The lines include data about the demand allocated from each demand point to the associated facility. The allocation-line geometries are returned in the spatial reference specified as the env:outSR parameter.

  • OID—A unique identifier for the allocation line. This identifier is automatically generated by the service.
  • Name—The name of the allocation line included the names of the demand point and facility the demand point is allocated to.
  • Weight—The weight assigned from the connected demand point to the connected facility.
  • TotalWeighted_[cost]— The weighted cost of traveling between the facility and the demand point. This is the Total_[cost] value multiplied by the weight of the demand point allocated to the facility. Note that though the lines have either straight or null geometries, the cost always refers to travel times or distances, not straight-line distances.
  • Total_[cost]—The travel time or travel distance between the facility and the demand point.
  • FacilityOID——The object ID value of the corresponding input facility feature.
  • DemandOID——The object ID value of the corresponding input demand point feature.

solve_succeeded

Use this parameter to determine if the service was able to successfully choose the best facilities. The error messages for any failure can be obtained by making a request to get the status of the job.

The solve_succeeded parameter is returned as a JSON feature set with following syntax:

{
    "paramName": "Solve_Succeeded",
    "dataType": "GPBoolean",
    "value": <true | false>
}

The following shows an example of the solve_succeeded parameter:

{
    "paramName": "Solve_Succeeded",
    "dataType": "GPBoolean",
    "value": true
}

Usage limits

The table below lists the limits that apply to this service.

Limit Description

Limit Value

Maximum number of facilities:

1,000

Maximum number of facilities to find:

100

Maximum number of demand points:

10,000

Maximum number of (point) barriers:

250

Maximum number of street features intersected by polyline barriers:

500

Maximum number of street features intersected by polygon barriers:

2,000

Force hierarchy beyond a straight-line distance of:

(If the straight-line distance between any facility and demand point is greater than the limit shown here, the analysis uses hierarchy, even if useHierarchy is set to false.)

50 miles (80.46 kilometers)

Maximum snap tolerance:

(If the distance between an input point and its nearest traversable street is greater than the distance specified here, the point is excluded from the analysis.)

12.42 miles (20 kilometers)

Maximum time a client can use the asynchronous service:

1 hour (3,600 seconds)

Examples

NoteNote:

If you copy and paste the request URL from the examples into a web browser, you will get an invalid token error message. You need to replace <yourToken> with a valid token. See Accessing services provided by Esri to see how to generate one.

Choose the best store location

In this example, you will find the one store location that provides the best access to customers.

Before performing the analysis, you would typically need to find locations that could accommodate your store. This may include surveying the real estate market to find commercial properties that are the right size and have the right price. The candidate facilities are specified with the facilities facilities parameter. Households are added as demand_points and weighted by the number of people living there. They represent potential customers.

The facilities and demand points are in the default spatial reference, WGS84, so the spatialReference property is not required.

Request URL to submit the job

The first request submits a job and returns the job id.

http://logistics.arcgis.com/arcgis/rest/services/World/LocationAllocation/GPServer/SolveLocationAllocation/submitJob?facilities={"features":[{"attributes":{"OBJECTID":1,"Name":"Facility A","FacilityType":0,"CurbApproach":0},"geometry":{"x":-58.557329417999938,"y":-34.587693706999971}},{"attributes":{"OBJECTID":2,"Name":"Facility B","FacilityType":0,"CurbApproach":0},"geometry":{"x":-58.460247408999976,"y":-34.683348039999942}}]}&demand_points={"features":[{"attributes":{"OBJECTID":1,"Name":"Household 4","GroupName":"A","Weight":2,"CurbApproach":0},"geometry":{"x":-58.664405163999959,"y":-34.614819562999969}},{"attributes":{"OBJECTID":2,"Name":"Household 3","GroupName":"A","Weight":2,"CurbApproach":0},"geometry":{"x":-58.514499119999982,"y":-34.496322404999944}},{"attributes":{"OBJECTID":3,"Name":"Household 2","GroupName":null,"Weight":3,"CurbApproach":0},"geometry":{"x":-58.54162497599998,"y":-34.788996107999935}},{"attributes":{"OBJECTID":4,"Name":"Household 1","GroupName":null,"Weight":5,"CurbApproach":1},"geometry":{"x":-58.40599569799997,"y":-34.637662387999967}}]}&token=<yourToken>&f=pjson

JSON response

{
    "jobId": "jb937dc0c7e324e68b95923c8fd9c8a1b",
    "jobStatus": "esriJobSubmitted"
}

Request URL to query job status

The job ID obtained from the response of the first request can be queried periodically to determine the status of the job.

https://logistics.arcgis.com/arcgis/rest/services/World/LocationAllocation/GPServer/SolveLocationAllocation/jobs/<jobID>/?token=<yourToken>&returnMessages=true&f=pjson

JSON response

{
 "jobId": "jb937dc0c7e324e68b95923c8fd9c8a1b",
 "jobStatus": "esriJobSucceeded",
 "results": {
  "Solve_Succeeded": {
   "paramUrl": "results/Solve_Succeeded"
  },
  "Output_Allocation_Lines": {
   "paramUrl": "results/Output_Allocation_Lines"
  },
  "Output_Facilities": {
   "paramUrl": "results/Output_Facilities"
  },
  "Output_Demand_Points": {
   "paramUrl": "results/Output_Demand_Points"
  }
 },
 "inputs": {
  "Facilities": {
   "paramUrl": "inputs/Facilities"
  },
  "Demand_Points": {
   "paramUrl": "inputs/Demand_Points"
  },
  "Measurement_Units": {
   "paramUrl": "inputs/Measurement_Units"
  },
  "Analysis_Region": {
   "paramUrl": "inputs/Analysis_Region"
  },
  "Problem_Type": {
   "paramUrl": "inputs/Problem_Type"
  },
  "Number_of_Facilities_to_Find": {
   "paramUrl": "inputs/Number_of_Facilities_to_Find"
  },
  "Default_Measurement_Cutoff": {
   "paramUrl": "inputs/Default_Measurement_Cutoff"
  },
  "Default_Capacity": {
   "paramUrl": "inputs/Default_Capacity"
  },
  "Target_Market_Share": {
   "paramUrl": "inputs/Target_Market_Share"
  },
  "Measurement_Transformation_Model": {
   "paramUrl": "inputs/Measurement_Transformation_Model"
  },
  "Measurement_Transformation_Factor": {
   "paramUrl": "inputs/Measurement_Transformation_Factor"
  },
  "Travel_Direction": {
   "paramUrl": "inputs/Travel_Direction"
  },
  "Time_of_Day": {
   "paramUrl": "inputs/Time_of_Day"
  },
  "Time_Zone_for_Time_of_Day": {
   "paramUrl": "inputs/Time_Zone_for_Time_of_Day"
  },
  "UTurn_at_Junctions": {
   "paramUrl": "inputs/UTurn_at_Junctions"
  },
  "Point_Barriers": {
   "paramUrl": "inputs/Point_Barriers"
  },
  "Line_Barriers": {
   "paramUrl": "inputs/Line_Barriers"
  },
  "Polygon_Barriers": {
   "paramUrl": "inputs/Polygon_Barriers"
  },
  "Use_Hierarchy": {
   "paramUrl": "inputs/Use_Hierarchy"
  },
  "Restrictions": {
   "paramUrl": "inputs/Restrictions"
  },
  "Attribute_Parameter_Values": {
   "paramUrl": "inputs/Attribute_Parameter_Values"
  },
  "Allocation_Line_Shape": {
   "paramUrl": "inputs/Allocation_Line_Shape"
  }
 },
 "messages": [
  
 ]
}

Request URL to return the output facilities

Because the job succeeded, a request can be made to return the facilities using the output_facilities output parameter.

https://logistics.arcgis.com/arcgis/rest/services/World/LocationAllocation/GPServer/SolveLocationAllocation/jobs/<jobID>/results/output_facilities?token=<yourToken>&f=pjson

{
 "paramName": "Output_Facilities",
 "dataType": "GPFeatureRecordSetLayer",
 "value": {
  "displayFieldName": "",
  "geometryType": "esriGeometryPoint",
  "spatialReference": {
   "wkid": 4326,
   "latestWkid": 4326
  },
  "fields": [
   {
    "name": "OID",
    "type": "esriFieldTypeOID",
    "alias": "OID"
   },
   {
    "name": "Name",
    "type": "esriFieldTypeString",
    "alias": "Name",
    "length": 128
   },
   {
    "name": "FacilityType",
    "type": "esriFieldTypeInteger",
    "alias": "FacilityType"
   },
   {
    "name": "Weight",
    "type": "esriFieldTypeDouble",
    "alias": "Weight"
   },
   {
    "name": "Capacity",
    "type": "esriFieldTypeDouble",
    "alias": "Capacity"
   },
   {
    "name": "DemandCount",
    "type": "esriFieldTypeInteger",
    "alias": "DemandCount"
   },
   {
    "name": "DemandWeight",
    "type": "esriFieldTypeDouble",
    "alias": "DemandWeight"
   },
   {
    "name": "CurbApproach",
    "type": "esriFieldTypeInteger",
    "alias": "CurbApproach"
   },
   {
    "name": "Status",
    "type": "esriFieldTypeInteger",
    "alias": "Status"
   },
   {
    "name": "Total_Minutes",
    "type": "esriFieldTypeDouble",
    "alias": "Total_Minutes"
   },
   {
    "name": "TotalWeighted_Minutes",
    "type": "esriFieldTypeDouble",
    "alias": "TotalWeighted_Minutes"
   },
   {
    "name": "FacilityOID",
    "type": "esriFieldTypeInteger",
    "alias": "FacilityOID"
   }
  ],
  "features": [
   {
    "attributes": {
     "OID": 1,
     "Name": "Facility A",
     "FacilityType": 0,
     "Weight": 1,
     "Capacity": 20,
     "DemandCount": 0,
     "DemandWeight": 0,
     "CurbApproach": 0,
     "Status": 0,
     "Total_Minutes": 0,
     "TotalWeighted_Minutes": 0,
     "FacilityOID": 1
    },
    "geometry": {
     "x": -58.557329417999938,
     "y": -34.587693706999971
    }
   },
   {
    "attributes": {
     "OID": 2,
     "Name": "Facility B",
     "FacilityType": 3,
     "Weight": 1,
     "Capacity": 20,
     "DemandCount": 4,
     "DemandWeight": 12,
     "CurbApproach": 0,
     "Status": 0,
     "Total_Minutes": 98.15948274044834,
     "TotalWeighted_Minutes": 255.65998780240028,
     "FacilityOID": 2
    },
    "geometry": {
     "x": -58.460247408999976,
     "y": -34.683348039999942
    }
   }
  ],
  "exceededTransferLimit": false
 }
}

Request URL to return the output demand points

The output demand points are requested using output_demand_points.

https://logistics.arcgis.com/arcgis/rest/services/World/LocationAllocation/GPServer/SolveLocationAllocation/jobs/<jobID>/results/output_demand_points?token=<yourToken>&f=pjson

{
 "paramName": "Output_Demand_Points",
 "dataType": "GPFeatureRecordSetLayer",
 "value": {
  "displayFieldName": "",
  "geometryType": "esriGeometryPoint",
  "spatialReference": {
   "wkid": 4326,
   "latestWkid": 4326
  },
  "fields": [
   {
    "name": "OID",
    "type": "esriFieldTypeOID",
    "alias": "OID"
   },
   {
    "name": "Name",
    "type": "esriFieldTypeString",
    "alias": "Name",
    "length": 128
   },
   {
    "name": "Weight",
    "type": "esriFieldTypeDouble",
    "alias": "Weight"
   },
   {
    "name": "AllocatedWeight",
    "type": "esriFieldTypeDouble",
    "alias": "AllocatedWeight"
   },
   {
    "name": "GroupName",
    "type": "esriFieldTypeString",
    "alias": "GroupName",
    "length": 128
   },
   {
    "name": "CurbApproach",
    "type": "esriFieldTypeInteger",
    "alias": "CurbApproach"
   },
   {
    "name": "Status",
    "type": "esriFieldTypeInteger",
    "alias": "Status"
   },
   {
    "name": "DemandOID",
    "type": "esriFieldTypeInteger",
    "alias": "DemandOID"
   },
   {
    "name": "FacilityOID",
    "type": "esriFieldTypeInteger",
    "alias": "FacilityOID"
   },
   {
    "name": "TimeCutoff",
    "type": "esriFieldTypeDouble",
    "alias": "Time Cutoff"
   }
  ],
  "features": [
   {
    "attributes": {
     "OID": 1,
     "Name": "Household 4",
     "Weight": 2,
     "AllocatedWeight": 2,
     "GroupName": "A",
     "CurbApproach": 0,
     "Status": 0,
     "DemandOID": 1,
     "FacilityOID": 2,
     "TimeCutoff": null
    },
    "geometry": {
     "x": -58.664405163999959,
     "y": -34.614819562999969
    }
   },
   {
    "attributes": {
     "OID": 2,
     "Name": "Household 3",
     "Weight": 2,
     "AllocatedWeight": 2,
     "GroupName": "A",
     "CurbApproach": 0,
     "Status": 0,
     "DemandOID": 2,
     "FacilityOID": 2,
     "TimeCutoff": null
    },
    "geometry": {
     "x": -58.514499119999982,
     "y": -34.496322404999944
    }
   },
   {
    "attributes": {
     "OID": 3,
     "Name": "Household 2",
     "Weight": 3,
     "AllocatedWeight": 3,
     "GroupName": null,
     "CurbApproach": 0,
     "Status": 0,
     "DemandOID": 3,
     "FacilityOID": 2,
     "TimeCutoff": null
    },
    "geometry": {
     "x": -58.54162497599998,
     "y": -34.788996107999935
    }
   },
   {
    "attributes": {
     "OID": 4,
     "Name": "Household 1",
     "Weight": 5,
     "AllocatedWeight": 5,
     "GroupName": null,
     "CurbApproach": 1,
     "Status": 0,
     "DemandOID": 4,
     "FacilityOID": 2,
     "TimeCutoff": null
    },
    "geometry": {
     "x": -58.40599569799997,
     "y": -34.637662387999967
    }
   }
  ],
  "exceededTransferLimit": false
 }
}

Request URL to return the output allocation lines

The lines connecting demand points to the facilities they are allocated to are requested using the output_allocation_lines output parameter.

https://logistics.arcgis.com/arcgis/rest/services/World/LocationAllocation/GPServer/SolveLocationAllocation/jobs/<jobID>/results/output_allocation_lines?token=<yourToken>&f=pjson

{
 "paramName": "Output_Allocation_Lines",
 "dataType": "GPFeatureRecordSetLayer",
 "value": {
  "displayFieldName": "",
  "geometryType": "esriGeometryPolyline",
  "spatialReference": {
   "wkid": 4326,
   "latestWkid": 4326
  },
  "fields": [
   {
    "name": "OID",
    "type": "esriFieldTypeOID",
    "alias": "OID"
   },
   {
    "name": "Name",
    "type": "esriFieldTypeString",
    "alias": "Name",
    "length": 128
   },
   {
    "name": "Weight",
    "type": "esriFieldTypeDouble",
    "alias": "Weight"
   },
   {
    "name": "TotalWeighted_Minutes",
    "type": "esriFieldTypeDouble",
    "alias": "TotalWeighted_Minutes"
   },
   {
    "name": "Total_Minutes",
    "type": "esriFieldTypeDouble",
    "alias": "Total_Minutes"
   },
   {
    "name": "Total_Miles",
    "type": "esriFieldTypeDouble",
    "alias": "Total_Miles"
   },
   {
    "name": "FacilityOID",
    "type": "esriFieldTypeInteger",
    "alias": "FacilityOID"
   },
   {
    "name": "DemandOID",
    "type": "esriFieldTypeInteger",
    "alias": "DemandOID"
   },
   {
    "name": "Total_Kilometers",
    "type": "esriFieldTypeDouble",
    "alias": "Total_Kilometers"
   },
   {
    "name": "Shape_Length",
    "type": "esriFieldTypeDouble",
    "alias": "Shape_Length"
   }
  ],
  "features": [
   {
    "attributes": {
     "OID": 1,
     "Name": "Facility B - Household 4",
     "Weight": 2,
     "TotalWeighted_Minutes": 60.168576445604977,
     "Total_Minutes": 30.084288222802488,
     "Total_Miles": 15.37109520474797,
     "FacilityOID": 2,
     "DemandOID": 1,
     "Total_Kilometers": 24.737380000000002,
     "Shape_Length": 0.21535213276531256
    },
    "geometry": {
     "paths": [
      [
       [
        -58.460247408999976,
        -34.683348039999942
       ],
       [
        -58.664405163999959,
        -34.614819562999969
       ]
      ]
     ]
    }
   },
   {
    "attributes": {
     "OID": 2,
     "Name": "Facility B - Household 3",
     "Weight": 2,
     "TotalWeighted_Minutes": 72.1604586665743,
     "Total_Minutes": 36.08022933328715,
     "Total_Miles": 17.676695567632418,
     "FacilityOID": 2,
     "DemandOID": 2,
     "Total_Kilometers": 28.447880000000001,
     "Shape_Length": 0.1947352980165141
    },
    "geometry": {
     "paths": [
      [
       [
        -58.460247408999976,
        -34.683348039999942
       ],
       [
        -58.514499119999982,
        -34.496322404999944
       ]
      ]
     ]
    }
   },
   {
    "attributes": {
     "OID": 3,
     "Name": "Facility B - Household 2",
     "Weight": 3,
     "TotalWeighted_Minutes": 54.965809847358813,
     "Total_Minutes": 18.321936615786271,
     "Total_Miles": 9.9908299927555344,
     "FacilityOID": 2,
     "DemandOID": 3,
     "Total_Kilometers": 16.078679999999999,
     "Shape_Length": 0.13335599980117666
    },
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3/3/2017