Modify LRS Event (Location Referencing)

Summary

Modifies properties of a linear referencing system (LRS) event.

Usage

• Modified fields should have the properties outlined in the ArcGIS Pipeline Referencing events data model and in the ArcGIS Roads and Highways events data model.

• This tool can be used to add or remove the following properties from an event:

  Present Event for a Continuous Network

  Event type	Supports route name	Supports spanning routes
  Line	No	N/A
  Line	Yes	N/A
  Point	No	N/A
  Point	Yes	N/A

  Modified Event for a Continuous Network

  Event type	Supports route name	Supports spanning routes
  Line	Yes	N/A
  Line	No	N/A
  Point	Yes	N/A
  Point	No	N/A

  Present Event for an Engineering Network

  Event type	Supports route name	Supports spanning routes
  Line	No	No
  Line	Yes	No
  Line	Yes	No
  Line	Yes	Yes
  Point	No	N/A
  Point	Yes	N/A

  Modified Event for an Engineering Network

  Event type	Supports route name	Supports spanning routes
  Line	Yes	No
  Line	No	No
  Line	Yes	Yes
  Line	Yes	No
  Point	Yes	N/A
  Point	No	N/A

Parameters

Dialog

Label	Explanation	Data Type
LRS Event Feature Class	The input feature class or feature layer for the event.	Feature Layer
Event ID Field	Name of the event ID field.	Field
Route ID Field	Name of the route ID field.	Field
From Date Field	Name of the from date field.	Field
To Date Field	Name of the to date field.	Field
Location Error Field	Name of the location error field.	Field
Measure Field	Name of the measure field if it is a point event or from measure field if it is a line event.	Field
To Measure Field (Optional)	Name of the to measure field. Required only for line events.	Field
Event Spans Routes (Optional)	As is—No change to the property. This is the default. Do not span routes—The event records do not span routes. Applicable only for line events. Spans routes— The event records may span routes. Applicable only for line events.	String
To Route ID Field (Optional)	Name of the to route ID field. Required only if it is a line event and it spans routes.	Field
Store Route Name (Optional)	As is—No change to the property. This is the default. Do not store route name—Does not store the route name with the event records. Store route name—Stores the route name with the event records.	String
Route Name Field (Optional)	The route name field if it is a point event that does not span routes, or the from route name field if it is a line event that spans routes. Required if Store Route Name is enabled.	Field
To Route Name Field (Optional)	Name of the to route name field. Required if it is a line event, Store Route Name is chosen, and it spans routes.	Field

Derived Output

Label	Explanation	Data Type
Updated LRS Event Feature Class	The updated event feature layer.	Feature Layer

Python

arcpy.locref.ModifyLRSEvent(in_feature_class, event_id_field, route_id_field, from_date_field, to_date_field, loc_error_field, measure_field, {to_measure_field}, {event_spans_routes}, {to_route_id_field}, {store_route_name}, {route_name_field}, {to_route_name_field})

Name	Explanation	Data Type
in_feature_class	The input feature class or feature layer for the event.	Feature Layer
event_id_field	Name of the event ID field.	Field
route_id_field	Name of the route ID field.	Field
from_date_field	Name of the from date field.	Field
to_date_field	Name of the to date field.	Field
loc_error_field	Name of the location error field.	Field
measure_field	Name of the measure field if it is a point event or from measure field if it is a line event.	Field
to_measure_field (Optional)	Name of the to measure field. Required only for line events.	Field
event_spans_routes (Optional)	Determines if the event records will span routes. AS_IS—No change to the property. This is the default. NO_SPANS_ROUTES—The event records do not span routes. Applicable only for line events. SPANS_ROUTES— The event records may span routes. Applicable only for line events.	String
to_route_id_field (Optional)	Name of the to route ID field. Required only if it is a line event and it spans routes.	Field
store_route_name (Optional)	Determines if the event records will store the route name. AS_IS—No change to the property. This is the default. STORE_ROUTE_NAME—Stores the route name with the event records. NO_STORE_ROUTE_NAME—Does not store the route name with the event records.	String
route_name_field (Optional)	The route name field if it is a point event that does not span routes, or the from route name field if it is a line event that spans routes. Required if STORE_ROUTE_NAME is set.	Field
to_route_name_field (Optional)	Name of the to route name field. Required if it is a line event, and store_route_name and SPANS_ROUTES are set.	Field

Derived Output

Name	Explanation	Data Type
out_feature_class	The updated event feature layer.	Feature Layer

Code sample

ModifyLRSEvent example 1 (Python window)

The following script demonstrates how to use the ModifyLRSEvent tool in a Python window for the events to span routes.

# Name: Modify_LRS_Event_ex1.py
# Description: Modify an event registered to a network so that it spans routes.
# Requires: ArcGIS Location Referencing

# Check out license
arcpy.CheckOutExtension("LocationReferencing")

# Tool variables
in_feature_class = "c:/data.gdb/LRS/Event1"
event_id_field = "EventID"
route_id_field = "FromRouteId"
from_date_field = "FromDate"
to_date_field = "ToDate"
loc_error_field = "LocationError"
measure_field = "FromMeasure"
to_measure_field = "ToMeasure"
event_spans_routes = "SPANS_ROUTES"
to_route_id_field = "ToRouteId"
store_route_name = "STORE_ROUTE_NAME"
route_name_field = "FromRouteName"
to_route_name_field = "ToRouteName"

# Set current workspace
arcpy.env.workspace = "c:/data.gdb"
 
# Execute the tool
arcpy.locref.ModifyLRSEvent(in_feature_class, event_id_field, route_id_field, from_date_field, to_date_field,
                            loc_error_field, measure_field, to_measure_field, event_spans_routes, to_route_id_field,
                            store_route_name, route_name_field, to_route_name_field)

# Check in license
arcpy.CheckInExtension('LocationReferencing')

ModifyLRSEvent example 2 (stand-alone script)

The following script demonstrates how to use the ModifyLRSEvent tool in a stand-alone Python script so that the events span routes.

# Name: Modify_LRS_Event_ex2.py
# Description: Modify an event registered to a network so that it spans routes.
# Requires: ArcGIS Location Referencing

# Import arcpy module
import arcpy

# Check out license
arcpy.CheckOutExtension("LocationReferencing")

# Local variables:
in_feature_class = r"C:/data.gdb/LRS/Event1"
event_id_field = "EventID"
route_id_field = "FromRouteId"
from_date_field = "FromDate"
to_date_field = "ToDate"
loc_error_field = "LocationError"
measure_field = "FromMeasure"
to_measure_field = "ToMeasure"
event_spans_routes = "SPANS_ROUTES"
to_route_id_field = "ToRouteId"
store_route_name = "STORE_ROUTE_NAME"
route_name_field = "FromRouteName"
to_route_name_field = "ToRouteName"
 
# Process:  Modify LRS Event From Existing Dataset
arcpy.locref.ModifyLRSEvent(in_feature_class, event_id_field, route_id_field, from_date_field, to_date_field,
                            loc_error_field, measure_field, to_measure_field, event_spans_routes, to_route_id_field,
                            store_route_name, route_name_field, to_route_name_field)

# Check in license
arcpy.CheckInExtension('LocationReferencing')

Environments

This tool does not use any geoprocessing environments.

Licensing information

• Basic: Requires ArcGIS Location Referencing
• Standard: Requires ArcGIS Location Referencing
• Advanced: Requires ArcGIS Location Referencing