Enable Referent Fields (Location Referencing)

Summary

Enables or modifies the referent fields so that you can manage referent information for the registered LRS event.

Learn more about event referent fields

Usage

  • The tool enables the referent fields by allowing you to register the existing fields as the referent fields.

  • If referent fields are already enabled, then by default, the tool will populate the existing fields so that they can be modified.

  • The existing data in the referent fields is not validated or updated when you enable or modify the referent fields.

  • To disable the referent fields, use the Disable Referent Fields tool.

Syntax

arcpy.locref.EnableReferentFields(in_feature_class, {from_referent_method_field}, {from_referent_location_field}, {from_referent_offset_field}, {to_referent_method_field}, {to_referent_location_field}, {to_referent_offset_field}, {offset_units})
ParameterExplanationData Type
in_feature_class

The feature class that will be used for the LRS event.

Feature Layer
from_referent_method_field
(Optional)

The From referent method field.

Field
from_referent_location_field
(Optional)

The From referent location field.

Field
from_referent_offset_field
(Optional)

The From referent offset field.

Field
to_referent_method_field
(Optional)

The To referent method field.

Field
to_referent_location_field
(Optional)

The To referent location field.

Field
to_referent_offset_field
(Optional)

The To referent offset field.

Field
offset_units
(Optional)

Specifies the offset units to be used. The default is feet.

  • CENTIMETERSCentimeters is the offset unit.
  • DECIMETERSDecimeters is the offset unit.
  • FEETFeet is the offset unit.
  • INCHESInches is the offset unit.
  • KILOMETERSKilometers is the offset unit.
  • METERSMeters is the offset unit.
  • MILESMiles is the offset unit.
  • MILLIMETERSMillimeters is the offset unit.
  • YARDSYards is the offset unit.
String

Derived Output

NameExplanationData Type
out_feature_class

The updated event feature layer.

Feature Layer

Code sample

EnableReferentFields example 1 (Python window)

The following Python window script demonstrates how to use the EnableReferentFields tool in immediate mode to enable referent fields for an existing LRS event.

# Name: Enable_Referent_Fields_ex1.py
# Description: Enable referent fields for an existing LRS Event that already has referent fields configured.
# Requires: ArcGIS Location Referencing

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

# Local variables:
inputEventFC = r"c:\EnableReferent\Py\EnableReferent.gdb\LRS"
fromReferentMethodField = 'FromRefMethod'
fromReferentLocationField = 'FromRefLocation'
fromReferentOffsetField = 'FromRefOffset'
toReferentMethodField = 'ToRefMethod'
toReferentLocationField = 'ToRefLocation'
toReferentOffsetField = 'ToRefOffset'
offsetUnit = 'FEET'

# Execute the tool
arcpy.EnableReferentFields_locref(inputEventFC, fromReferentMethodField, fromReferentLocationField,
                                  fromReferentOffsetField, toReferentMethodField, toReferentLocationField,
                                  toReferentOffsetField, offsetUnit)

# Check in license
arcpy.CheckInExtension('LocationReferencing')
EnableReferentFields example 2 (stand-alone script)

The following stand-alone Python script demonstrates how to use the EnableReferentFields tool to enable referent fields for an existing LRS event.

# Name: Enable_Referent_Fields_ex2.py
# Description: Enables referent fields for an existing LRS Event.
# Requires: ArcGIS Pipeline Referencing

# Import arcpy module
import arcpy

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

# Local variables
inputEventFC = "c:\EnableReferent\Py\EnableReferent.gdb\LRS"
fromReferentMethodField = 'FromRefMethod'
fromReferentLocationField = 'FromRefLocation'
fromReferentOffsetField = 'FromRefOffset'
toReferentMethodField = 'ToRefMethod'
toReferentLocationField = 'ToRefLocation'
toReferentOffsetField = 'ToRefOffset'
offsetUnit = 'FEET'

# execute the tool
arcpy.EnableReferentFields_locref(inputEventFC, fromReferentMethodField, fromReferentLocationField,
                                  fromReferentOffsetField, toReferentMethodField, toReferentLocationField,
                                  toReferentOffsetField, offsetUnit)

# Check in license
arcpy.CheckInExtension('LocationReferencing')
EnableReferentFields example 3 (stand-alone script)

The following stand-alone Python script demonstrates how to use the EnableReferentFields tool to modify referent fields for an existing LRS event that already has configured referent fields.

# Name: Enable_Referent_Fields_ex3.py
# Description: Modifies  referent fields for an existing LRS Event that already has referent fields configured.
# Requires: ArcGIS Location Referencing

# Import arcpy module
import arcpy

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

# Local variables:
inputEventFC = r"c:\EnableReferent\Py\EnableReferent.gdb\LRS"
toReferentMethodField = 'ToRefMethod2'
toReferentLocationField = 'ToRefLocation2'
toReferentOffsetField = 'ToRefOffset2'

# Execute the tool
arcpy.EnableReferentFields_locref(inputEventFC, '' , '' , '' , toReferentMethodField, toReferentLocationField, toReferentOffsetField)

# 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

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