Registering an event offset from a point feature class

In this type of reference offset event, an event table is registered and posted against the location of a point feature class. This event type is only available as a point event. The positive and negative offset number provides the direction of the offset with reference to the calibration of the route.

Attribute table for the point feature class

Attribute table for the point event

步骤:

1. Start ArcMap and open the Catalog window or start ArcCatalog.
2. In the Catalog tree, connect to the geodatabase that contains the advanced linear referencing system (ALRS) and LRS Network for which you want to add event layers.
3. Expand the ALRS that contains the LRS Network for which you want to add event layers.
4. Right-click the LRS Network and click New > LRS Event.

   The ALRS Event Setup wizard appears.

5. Click Next.
6. Choose Offset from a Point Feature Class.

   

7. Click Next.

   The General event properties page of the wizard appears.

   
8. Type a name for your event layer in the Event Name text box.
9. Verify that the parent network is set to the correct network.
10. Click the browse button next to the Event Table text box.

    The Browse Data dialog box appears.

    See Registering an external event source to learn more about setting up database connections to your external event database.

    When adding local events to an SDE geodatabase, the event table must be registered as versioned.

11. Browse to the business table for which you want to create an event layer and click Select.

    If the table you browse to is in the same geodatabase as your LRS Network, you will create an internal event. If the table you browse to is outside of the geodatabase, you will create an external event.

    The General event properties dialog box is populated with information from the event table.
12. Verify and update the rest of the information on the General event properties dialog box as needed.
    1. Set the Event ID Field that identifies the events.
    2. Set the Route ID Field that contains information about what route with which the event is associated.
    3. Set the From Date Field that stores the start date of the event, when it is considered active.
    4. Set the To Date Field that stores the end date of the event, after which it is retired.
    5. Set the Time zone for storing the date and time.
13. Click Next to set the Feature Reference Offset properties.
    1. Click the browse button next to the Feature Class text box to select the parent point feature class from which the events will offset.

       The point feature class and the event table should be present in the same database.

    2. Click the Parent Feature Class Properties Reference ID Field drop-down arrow and choose a field that is a unique identifier for the point feature from which the event will offset.
    3. Click the Offset Event Properties Reference ID Field drop-down arrow and choose the field that stores the ID of the associated point features from the parent feature class that will be offset.
    4. Click the Offset Event Properties Offset Field drop-down arrow and choose the field that contains the measure value of the offset from the parent event.
    5. Click the Offset Event Properties Offset Units from the drop-down list which specifies the offset unit of measure.
14. Click Finish to register the reference offset event.