Apply Spatial Dispatch Layout (Network Diagram)


Separates diagram junctions that are visibly close to overlapping.

Learn more about the Spatial Dispatch layout algorithm


If you have an open edit session, you must save your edits prior to running this tool. This ensures that the diagram reflects the latest changes made to the network topology in the database. If you fail to save your edits, the edits will not be reflected in the diagram.


Each layout algorithm includes default parameter values. The default parameter values will be used unless otherwise specified. If the input network diagram is based on a template for which this layout has been configured with a different parameter value, that value is used instead.


  • This tool is not supported when working with a database connection to a utility network or trace network in an enterprise geodatabase. You must use either the related published utility network or trace network service, or a utility network or trace network in a file geodatabase.

  • The input network diagram layer must be from either a utility network or a trace network in a file geodatabase or a network diagram service.

  • This layout algorithm progressively separates diagram junctions that are visibly close to overlapping according to their current positions and to the shift factor specified.

  • Consider applying the layout in asynchronous mode on the server when working on very large diagrams.


arcpy.nd.ApplySpatialDispatchLayout(in_network_diagram_layer, {are_containers_preserved}, {iterations_number}, {maximum_shift_factor}, {run_async})
ParameterExplanationData Type

The network diagram to which the layout will be applied.

Diagram Layer

Specifies how the algorithm will process containers.

  • PRESERVE_CONTAINERS The layout algorithm will execute on the top graph of the diagram so containers are preserved.
  • IGNORE_CONTAINERSThe layout algorithm will execute on both content and noncontent features in the diagram. This is the default.

The number of iterations to process. The default is 5.


The maximum value used to increase the diagram junctions' displacement for junctions that are very close together. The greater the shift factor, the larger the separation between the diagram junctions that almost overlap. The default is 2.


Specifies whether the layout algorithm will run asynchronously or synchronously on the server.

  • RUN_ASYNCHRONOUSLYThe layout algorithm will run asynchronously on the server. This option dedicates server resources to run the layout algorithm with a longer time-out. Running asynchronously is recommended when executing layouts that are time consuming and may exceed the server time-out—for example, Partial Overlapping Edges—and applying to large diagrams—more than 25,000 features.
  • RUN_SYNCHRONOUSLYThe layout algorithm will run synchronously on the server. It can fail without completion if its execution exceeds the service time-out: 600 seconds by default. This is the default.

Derived Output

NameExplanationData Type

The updated network diagram layer.

Diagram Layer

Code sample

ApplySpatialDispatchLayout example (Python window)

Apply the Spatial Dispatch Layout algorithm to the diagram called Temporary Diagram.

import arcpy
arcpy.ApplySpatialDispatchLayout_nd("Temporary Diagram", "PRESERVE_CONTAINERS", 
                                    5, 2, "RUN_SYNCHRONOUSLY")


This tool does not use any geoprocessing environments.

Licensing information

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

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