com.esri.arcgis.geoprocessing.tools.spatialanalysttools
Class CostDistance

java.lang.Object
  com.esri.arcgis.geoprocessing.AbstractGPTool
      com.esri.arcgis.geoprocessing.tools.spatialanalysttools.CostDistance

All Implemented Interfaces:

GPTool

public class CostDistance
extends AbstractGPTool

Calculates the least accumulative cost distance for each cell to the nearest source over a cost surface. The Cost Distance tool is contained in the Spatial Analyst Tools tool box.

Usage tips:

• The input source data can be a feature class or raster.
• When the input source data is a raster, the set of source cells consists of all cells in the source raster that have valid values. Cells that have NoData values are not included in the source set. The value 0 is considered a legitimate source. A source raster can be easily created using the .
• Cell locations with NoData in the Input cost raster act as barriers in the cost surface tools. Any cell location that is assigned NoData on the input cost surface will receive NoData on all output rasters (cost distance, allocation, and back link).
• If the input source data and the cost raster are different extents, the default output extent is the intersection of the two. To get a cost distance surface for the entire extent, choose the Union of Inputs option on the output environment settings.
• If a has been set in the environment, all masked cells will be treated as NoData values.When a mask has been defined in the Raster Analysis window and the cells to be masked will mask a source, the calculations will occur on the remaining source cells. The source cells that are masked will not be considered in the computations. These cell locations will be assigned NoData on all outputs (distance, allocation, and back link) rasters.
• The Maximum distance is specified in the same cost units as those on the cost raster.
• For the output distance raster, the least-cost distance (or minimum accumulative cost distance) of a cell to a set of source locations is the lower bound of the least-cost distances from the cell to all source locations.
• The cost raster cannot contain values of zero since the algorithm is a multiplicative process. If your cost raster does contain values of zero, and these values represent areas of lowest cost, change values of zero to a small positive value (such as 0.01) before running Cost Distance, by first running the tool. If areas with a value of zero represent areas that should be excluded from the analysis, these values should be turned to NoData before running Cost Distance, by first running the tool.

Field Summary

Fields inherited from class com.esri.arcgis.geoprocessing.AbstractGPTool

vals

Constructor Summary

CostDistance()
Creates the Cost Distance tool with defaults.

CostDistance(Object inSourceData, Object inCostRaster, Object outDistanceRaster)
Creates the Cost Distance tool with the required parameters.

Method Summary

Object	getInCostRaster() Returns the Input cost raster parameter of this tool .
Object	getInSourceData() Returns the Input raster or feature source data parameter of this tool .
double	getMaximumDistance() Returns the Maximum distance parameter of this tool .
Object	getOutBacklinkRaster() Returns the Output backlink raster parameter of this tool .
Object	getOutDistanceRaster() Returns the Output distance raster parameter of this tool .
String	getToolboxAlias() Returns the alias of the tool box containing this tool.
String	getToolboxName() Returns the name of the tool box containing this tool.
String	getToolName() Returns the name of this tool.
void	setInCostRaster(Object inCostRaster) Sets the Input cost raster parameter of this tool .
void	setInSourceData(Object inSourceData) Sets the Input raster or feature source data parameter of this tool .
void	setMaximumDistance(double maximumDistance) Sets the Maximum distance parameter of this tool .
void	setOutBacklinkRaster(Object outBacklinkRaster) Sets the Output backlink raster parameter of this tool .
void	setOutDistanceRaster(Object outDistanceRaster) Sets the Output distance raster parameter of this tool .

Methods inherited from class com.esri.arcgis.geoprocessing.AbstractGPTool

getParameterValues, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

CostDistance

public CostDistance()

Creates the Cost Distance tool with defaults.

Initializes the array of tool parameters with the default values specified when the tool was created.

CostDistance

public CostDistance(Object inSourceData,
                    Object inCostRaster,
                    Object outDistanceRaster)

Creates the Cost Distance tool with the required parameters.

Initializes the array of tool parameters with the values as specified for the required parameters and with the default values for the other parameters.

Parameters:

inSourceData - the input source locations. this is a raster or feature dataset that identifies the cells or locations to which the least accumulated cost distance for every output cell location is calculated. for rasters, the input type can be integer or floating point.

inCostRaster - a raster defining the impedance or cost to move planimetrically through each cell. the value at each cell location represents the cost per unit distance for moving through the cell. Each cell location value is multiplied by the cell resolution while also compensating for diagonal movement to obtain the total cost of passing through the cell. the values of the cost raster can be integer or floating point, but they cannot be negative or zero (you cannot have a negative or zero cost).

outDistanceRaster - the output cost distance raster. the cost distance raster identifies, for each cell, the least accumulative cost distance over a cost surface to the identified source locations. a source can be a cell, a set of cells, or one or more feature locations. the output raster is of floating point type.

Method Detail

getInSourceData

public Object getInSourceData()

Returns the Input raster or feature source data parameter of this tool . This parameter is the input source locations. this is a raster or feature dataset that identifies the cells or locations to which the least accumulated cost distance for every output cell location is calculated. for rasters, the input type can be integer or floating point. This is a required parameter.

Returns:

the Input raster or feature source data

setInSourceData

public void setInSourceData(Object inSourceData)

Sets the Input raster or feature source data parameter of this tool . This parameter is the input source locations. this is a raster or feature dataset that identifies the cells or locations to which the least accumulated cost distance for every output cell location is calculated. for rasters, the input type can be integer or floating point. This is a required parameter.

Parameters:

inSourceData - the input source locations. this is a raster or feature dataset that identifies the cells or locations to which the least accumulated cost distance for every output cell location is calculated. for rasters, the input type can be integer or floating point.

getInCostRaster

public Object getInCostRaster()

Returns the Input cost raster parameter of this tool . This parameter is a raster defining the impedance or cost to move planimetrically through each cell. the value at each cell location represents the cost per unit distance for moving through the cell. Each cell location value is multiplied by the cell resolution while also compensating for diagonal movement to obtain the total cost of passing through the cell. the values of the cost raster can be integer or floating point, but they cannot be negative or zero (you cannot have a negative or zero cost). This is a required parameter.

Returns:

the Input cost raster

setInCostRaster

public void setInCostRaster(Object inCostRaster)

Sets the Input cost raster parameter of this tool . This parameter is a raster defining the impedance or cost to move planimetrically through each cell. the value at each cell location represents the cost per unit distance for moving through the cell. Each cell location value is multiplied by the cell resolution while also compensating for diagonal movement to obtain the total cost of passing through the cell. the values of the cost raster can be integer or floating point, but they cannot be negative or zero (you cannot have a negative or zero cost). This is a required parameter.

Parameters:

inCostRaster - a raster defining the impedance or cost to move planimetrically through each cell. the value at each cell location represents the cost per unit distance for moving through the cell. Each cell location value is multiplied by the cell resolution while also compensating for diagonal movement to obtain the total cost of passing through the cell. the values of the cost raster can be integer or floating point, but they cannot be negative or zero (you cannot have a negative or zero cost).

getOutDistanceRaster

public Object getOutDistanceRaster()

Returns the Output distance raster parameter of this tool . This parameter is the output cost distance raster. the cost distance raster identifies, for each cell, the least accumulative cost distance over a cost surface to the identified source locations. a source can be a cell, a set of cells, or one or more feature locations. the output raster is of floating point type. This is a required parameter.

Returns:

the Output distance raster

setOutDistanceRaster

public void setOutDistanceRaster(Object outDistanceRaster)

Sets the Output distance raster parameter of this tool . This parameter is the output cost distance raster. the cost distance raster identifies, for each cell, the least accumulative cost distance over a cost surface to the identified source locations. a source can be a cell, a set of cells, or one or more feature locations. the output raster is of floating point type. This is a required parameter.

Parameters:

outDistanceRaster - the output cost distance raster. the cost distance raster identifies, for each cell, the least accumulative cost distance over a cost surface to the identified source locations. a source can be a cell, a set of cells, or one or more feature locations. the output raster is of floating point type.

getMaximumDistance

public double getMaximumDistance()

Returns the Maximum distance parameter of this tool . This parameter is defines the threshold that the accumulative cost values cannot exceed. if an accumulative cost distance value exceeds this value, the output value for the cell location will be NoData. The maximum distance defines the extent for which the accumulative cost distances are calculated. the default distance is to the edge of the output raster. This is an optional parameter.

Returns:

the Maximum distance

setMaximumDistance

public void setMaximumDistance(double maximumDistance)

Sets the Maximum distance parameter of this tool . This parameter is defines the threshold that the accumulative cost values cannot exceed. if an accumulative cost distance value exceeds this value, the output value for the cell location will be NoData. The maximum distance defines the extent for which the accumulative cost distances are calculated. the default distance is to the edge of the output raster. This is an optional parameter.

Parameters:

maximumDistance - defines the threshold that the accumulative cost values cannot exceed. if an accumulative cost distance value exceeds this value, the output value for the cell location will be NoData. The maximum distance defines the extent for which the accumulative cost distances are calculated. the default distance is to the edge of the output raster.

getOutBacklinkRaster

public Object getOutBacklinkRaster()

Returns the Output backlink raster parameter of this tool . This parameter is the output cost back-link raster. the back-link raster contains values of 0 through 8, which define the direction or identify the next neighboring cell (the succeeding cell) along the least accumulative cost path from a cell to reach its least cost source. if the path is to pass into the right neighbor, the cell will be assigned the value 1, 2 for the lower right diagonal cell, and continuing clockwise. The value 0 is reserved for source cells. This is an optional parameter.

Returns:

the Output backlink raster

setOutBacklinkRaster

public void setOutBacklinkRaster(Object outBacklinkRaster)

Sets the Output backlink raster parameter of this tool . This parameter is the output cost back-link raster. the back-link raster contains values of 0 through 8, which define the direction or identify the next neighboring cell (the succeeding cell) along the least accumulative cost path from a cell to reach its least cost source. if the path is to pass into the right neighbor, the cell will be assigned the value 1, 2 for the lower right diagonal cell, and continuing clockwise. The value 0 is reserved for source cells. This is an optional parameter.

Parameters:

outBacklinkRaster - the output cost back-link raster. the back-link raster contains values of 0 through 8, which define the direction or identify the next neighboring cell (the succeeding cell) along the least accumulative cost path from a cell to reach its least cost source. if the path is to pass into the right neighbor, the cell will be assigned the value 1, 2 for the lower right diagonal cell, and continuing clockwise. The value 0 is reserved for source cells.

getToolName

public String getToolName()

Returns the name of this tool.

Returns:

the tool name

getToolboxName

public String getToolboxName()

Returns the name of the tool box containing this tool.

Returns:

the tool box name

getToolboxAlias

public String getToolboxAlias()

Returns the alias of the tool box containing this tool.

Returns:

the tool box alias