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Create connectivity

There are two ways to connect features in a utility network: geometric coincident based connectivity or a connectivity association. To obtain either type of connectivity, a rule must exist to support the relationship.

Use geometric coincident based connectivity to connect the following:

  • A point and a line (junction-edge)
  • A line, a point, and another line (edge-junction-edge)
  • A line to a terminal on a device (junction-edge)

Use a connectivity association to connect the following:

  • Two points that are not coincident (junction-junction)
  • Two points with terminals (junction-junction)


A rule exists to support connectivity between the two selected features.

Create connectivity association: Junction-junction

Use the Modify Associations pane to connect two point features together. If either or both points have terminals, parameters in the pane will allow you to specify which terminal or terminals to connect to.

If a feature cannot participate in the desired association, it is not added to the pane and instead a warning is returned.

  1. On the ribbon, under Utility Network, click Data.
  2. In the Association group, click Modify.
  3. In the Modify Associations pane, ensure the Connectivity tab is active.
  4. Ensure the Select a junction tool is active.
  5. In the map, click one of the point features you want to establish a connectivity association between.
    • If you are going to create multiple associations between a single point and many other points (radial, not chained), click the single point at this step. If you are going to create a single association between two point features, the order is irrelevant.
    • If the point feature has terminals, a Terminal drop-down menu will appear in the pane. Select the appropriate terminal to connect to.
  6. In the map, click the other point feature or features.
    • If you are connecting the point feature selected in step 5 to many points, continue clicking points in the map to add them to the pane.
    • If a point feature has terminals, a Terminal drop-down menu will appear. Select the appropriate terminal to connect to.

    When a new feature is added to the pane, an asterisk is placed beside it, indicating that it hasn't been saved. If there are existing connectivity associations to other features, they appear in the pane without asterisks. Click the Refresh button to remove the features with asterisks. Click the Clear button to remove all features from the pane and start again at step 4.

  7. Click Apply.

The specified points are connected using a connectivity association. Validate the network topology to reflect the change. Update the subnetwork if the feature was connected to one. Once the network topology is valid and the subnetwork has been updated, appropriate traces can travel through these features.

Create geometric coincident based connectivity: Junction-edge and edge-junction-edge

Use geometric coincidence to establish connectivity between a line and a point feature, or two lines with an intermediate point feature. In a rule based system, the two or three features snap together when they are placed coincident with each other. When the network topology is validated and a rule does not exist to support the connectivity, error features are generated. The features are disconnected (no longer snapped together) and connectivity is not established.

Before you begin, ensure an appropriate snapping environment is set up.


This workflow does not support terminals.

  1. In an active map, create a line feature.
    • If you are going to be locating the point feature (without terminals) midspan along the line, be sure to digitize the appropriate vertex.
    • If you are working with an edge-junction-edge case, the point can only be at the endpoints of the lines.
  2. Create a point feature geometrically coincident to the line feature. The point will snap to the line provided the snapping environment has been set up correctly.
    • If you are working with an edge-junction-edge case, the point must be located at the end of the line.
  3. If you are creating edge-junction-edge connectivity, create the second line with one endpoint coincident to the point feature.

The specified point and line features are connected/snapped together. Validate the network topology and update a subnetwork if these new features are now connected to one.

Create geometric coincident based connectivity: Junction (terminal)-edge

If there is only one rule to support connectivity to only one of the terminals on a device, snapping a line to that device and then validating the topology will connect them. In this scenario, the To Device Terminal or From Device Terminal attributes on the line are automatically populated when the topology is validated or enabled.

If there is more than one terminal allowed to connect to the line end, the Modify Terminal Connections pane must be used to set the To Device Terminal or From Device Terminal attributes.

Refer to Modify terminal connections for this workflow.