Derive Event Measures (Location Referencing)

摘要

Populates and updates the DerivedRouteID field and measure values on point and line events with those fields configured and enabled.

使用情况

• An LRS dataset is required to run this tool. To create an LRS dataset, add the calibration point, centerline, and redline layers to a feature dataset; then run the Modify LRS tool with the geodatabase as the input.

• This tool is designed to be executed as part of a larger workflow. The Apply Event Behaviors and Generate Routes tools should be run before executing Derive Event Measures. Running this tool without running the previous tools in the workflow may result in inaccurate data.

• It is recommended that you run this tool against the file geodatabase at initial migration of the data. It will run faster this way because the operation must modify every single event record in the database. Once in production, the tool can be run on only a selection set of the routes that have been modified to significantly reduce execution time.

• The input event feature layer must have DerivedRouteID and measure fields configured.

• This tool can be run against one, multiple, or all events in a line network.

• When conflict prevention is enabled, the following are supported:

  • The events whose derived event measures need to be updated will automatically acquire event locks, if available. If the locks cannot be acquired, the tool will fail and provide the text file of offending locks.

    Learn more about conflict prevention inPipeline Referencing

    Learn more about conflict prevention in Roads and Highways

  • While working in the default version, the acquired locks are released automatically when the tool completes.
  • While working in a child version, the acquired locks will remain in post status when the tool completes. The user must post or delete the version to release the locks.
  • While working in a child version, if the execution of the tool is canceled by interruption, the acquired locks will remain in releasable status.

参数

对话框

标注	说明	数据类型
Input Route Features	The LRS Network containing the events with DerivedRouteID and measure fields configured.	Feature Layer
Update all event feature classes registered in the selected network (可选)	Determines whether all event feature classes in the network will be updated. Checked—Updates all events in the network selected in Input Route Features. This is the default. Unchecked—Does not update all events in the network selected in Input Route Features. Allows the user to select individual event layers in the event layers parameter below.	Boolean
Event Layers (可选)	The event layers that will have DerivedRouteID and measure fields updated.	Feature Layer

派生输出

标注	说明	数据类型
Output Events	The updated events feature layer.	Feature Layer
Output Details File	The text file that details changes made to the events feature layer. 注： 此工具的验证结果将写入 ArcGIS Server 目录。 默认情况下，此文件会在 10 分钟内自动清除，这可能不足以处理所有验证并将其写入正在运行 ArcGIS Pro 的工作站。 对于较大的数据负载，建议您将文件最长保留期限调整为至少一小时。	Text File

Python

arcpy.locref.DeriveEventMeasures(in_route_features, {update_all_events}, {event_layers})

名称	说明	数据类型
in_route_features	The LRS Network containing the events with DerivedRouteID and measure fields configured.	Feature Layer
update_all_events (可选)	Determines whether all event feature classes in the network will be updated. UPDATE_ALL—Updates all events in the network selected in in_route_features. This is the default. UPDATE_SOME—Does not update all events in the network selected in the in_route_features. Allows the user to select individual event layers in the event_layers parameter below.	Boolean
event_layers [event_layers,...] (可选)	The event layers that will have DerivedRouteID and measure fields updated.	Feature Layer

派生输出

名称	说明	数据类型
out_events	The updated events feature layer.	Feature Layer
out_details_file	The text file that details changes made to the events feature layer. 注： 此工具的验证结果将写入 ArcGIS Server 目录。 默认情况下，此文件会在 10 分钟内自动清除，这可能不足以处理所有验证并将其写入正在运行 ArcGIS Pro 的工作站。 对于较大的数据负载，建议您将文件最长保留期限调整为至少一小时。	Text File

代码示例

DeriveEventMeasures example 1 (Python window)

The following Python window script demonstrates how to use DeriveEventMeasures in immediate mode.

# Name: DeriveEventMeasures_ex1.py
# Description: Populate and update the Derived RouteID and measure values on point and line events with those fields configured and enabled.
# Requires: ArcGIS Location Referencing

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

# Local variables
in_route_features = r'C:\Data\PipelineReferencing.gdb\LRS\LineNetwork'
update_all_events = "UPDATE_SOME"
event_layers = "Casing, Coating"

# Set current workspace
arcpy.env.workspace = "C:\Data\PipelineReferencing.gdb"

# Execute the tool
arcpy.DeriveEventMeasures_locref(in_route_features, update_all_events, event_layers)

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

DeriveEventMeasures example 2 (stand-alone script)

The following stand-alone Python script demonstrates how to use the DeriveEventMeasures tool.

# Name: DeriveEventMeasures_ex2.py
# Description: Populate and update the Derived routeID and measure values on point and line events with those fields configured and enabled.
# Requirements: ArcGIS Location Referencing

# Import arcpy module
import arcpy

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

# Local variables
in_route_features = r'C:\Data\PipelineReferencing.gdb\LRS\LineNetwork'
update_all_events = "UPDATE_ALL"
event_layers = ""

# Execute the tool
arcpy.DeriveEventMeasures_locref(in_route_features, update_all_events, event_layers)

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

DeriveEventMeasures example 3 (stand-alone script)

The following stand-alone Python script demonstrates how to use the DeriveEventMeasures tool in a feature service.

# Name: DeriveEventMeasures_Pro_Ex3.py
# Description: Populate and update Derived RouteID and measure values on point and line events with those fields configured and enabled.
# Requires: ArcGIS Location Referencing

# Import arcpy module.
import arcpy

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

## Input LRS Route Network is in feature service. Portal signin is required to access the feature service.
arcpy.SignInToPortal('https://yourdomain.com/portal', 'username', 'password')

## Map the input route network from the feature service. Here, 3 corresponds to the input route network.
in_lrs_network = r"https://yourdomain.com/server/rest/services/FeatureServiceName/FeatureServer/3"

# Set tool variables.
update_all_events = "UPDATE_ALL"
event_layers = ""

# Process : Derive Event Measures.
arcpy.DeriveEventMeasures_locref(in_lrs_network, update_all_events, event_layers)

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

环境

当前工作空间

特殊情况

许可信息

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