Validate Network Topology (Trace Network)

Summary

Validates the network topology of a trace network. Validation of the network topology is necessary after edits have been made to network attributes or the geometry of features in the network.

Learn more about validating the network topology

Usage

• Inconsistencies between feature spatial edits and the network topology are marked with dirty areas.

• The network topology must be enabled.

• Invalid geometries encountered during the validate process will be included as error features in the Point Error and Line Error feature classes grouped under the trace network layer in the Contents pane.

• When working with an enterprise geodatabase, the input trace network must be from a trace network service.

• When working with an enterprise geodatabase, only a single session can execute the validation operation at a time in the default version.

License:

Organization members must be assigned a license for the ArcGIS Advanced Editing user type extension to use this tool in an enterprise deployment.

Parameters

Dialog

Label	Explanation	Data Type
Input Trace Network	The trace network for which the network topology will be validated. When working with an enterprise geodatabase, the input trace network must be from a trace network service.	Trace Network; Trace Network Layer
Extent (Optional)	The geographical extent used to validate the network topology. Current Display Extent —The extent will be based on the active map or scene. This option is only available when there is an active map. Draw Extent —The extent will be based on a rectangle drawn on the map or scene. This option will create a feature class in the project geodatabase and add a layer to the map. The feature class will have the same coordinate system as the map. Note: This option is not available in the Environments dialog box. It is only available from a tool parameter with an extent data type or from the Environments tab on a tool dialog box. Note: When the Enable and disable editing from the Edit tab editing option is checked, you must enable editing on the Edit ribbon tab to draw the extent. Extent of a Layer —The extent will be based on an active map layer. Use the drop-down list to choose an available layer or use the Extent of data in all layers option to get the combined extent of all active map layers, excluding the basemap. This option is only available when there is an active map with layers. Each map layer has the following options: All Features —The extent of all features in the layer. Selected Features —The extent of the selected features in the layer. Visible Features —The extent of visible features in the layer. Note: The extents from the Selected Features and Visible Features options are only available for feature layers. Browse —The extent will be based on an existing dataset. Intersection of Inputs —The extent will be based on the minimum or intersecting extent of all inputs. If no inputs overlap, a null extent with all zeros will result. Union of Inputs —The extent will be based on the maximum or combined extent of all inputs. Clipboard —The extent can be copied to and from the clipboard. Copy Extent —Copies the extent coordinates and coordinate system to the clipboard. Paste Extent —Pastes the extent coordinates and, optionally, the coordinate system from the clipboard. If the clipboard values do not include a coordinate system, the extent will use the map’s coordinate system. Note: The extent coordinates are copied to and pasted from the clipboard using the same formatting and order as the ArcPy Extent object: x-min, y-min, x-max, y-max, and the spatial reference. Reset Extent —The extent will be reset to the default value. Manually entered coordinates—The coordinates must be numeric values and in the active map's coordinate system. Caution: The map may use different display units than the entered coordinates. The use of a cardinal direction (N, S, E, W) is not supported. Use a negative value sign for south and west coordinates.	Extent

Derived Output

Label	Explanation	Data Type
Validated Network Topology	The validated trace network.	Trace Network

Python

arcpy.tn.ValidateNetworkTopology(in_trace_network, {extent})

Name	Explanation	Data Type
in_trace_network	The trace network for which the network topology will be validated. When working with an enterprise geodatabase, the input trace network must be from a trace network service.	Trace Network; Trace Network Layer
extent (Optional)	The geographical area for which to build the trace network. This parameter is similar to the Extent geoprocessing environment. MAXOF—The maximum extent of all inputs will be used. MINOF—The minimum area common to all inputs will be used. DISPLAY—The extent is equal to the visible display. Layer name—The extent of the specified layer will be used. Extent object—The extent of the specified object will be used. Space delimited string of coordinates—The extent of the specified string will be used. Coordinates are expressed in the order of x-min, y-min, x-max, y-max.	Extent

Derived Output

Name	Explanation	Data Type
out_trace_network	The validated trace network.	Trace Network

Code sample

ValidateNetworkTopology example (Python window)

Build the network topology for the HydroNetwork trace network.

import arcpy
arcpy.tn.ValidateNetworkTopology("C:\\MyTNProject\\NHD.gdb\\HydroNetwork")

Environments

This tool does not use any geoprocessing environments.

Licensing information

• Basic: No
• Standard: Yes
• Advanced: Yes