Every feature in the line, device, and junction feature classes as well as every object in the domain network's junction object and edge object tables contains an Is connected attribute. This attribute helps identify isolated network features and objects by maintaining information about their connectivity to subnetwork controllers. When a feature is created, regardless of its connectivity, the Is connected attribute is set to unknown. This attribute is modified for network features depending on the operation being performed.
In the management of subnetworks, there are several operations that will impact the Is connected attribute for specific subnetwork features or subnetwork controllers. These operations only update the Is connected attribute for subnetwork controller feature or features that have connectivity to a subnetwork controller. The path to a subnetwork controller is based on connectivity, not traversability.
To identify isolated features in the network, use the Update Is Connected geoprocessing tool. This tool updates the Is connected attribute for all datasets in the utility network.
The date and time stamp for the Last Update Is Connected Time property is listed on the Network Properties tab for the utility network in the General section.
Dive-in:The Update Is Connected tool performs attribute edits in place. This means that the Update Is Connected process bypasses eventing and will not prompt the evaluation of attribute rules. See Evaluate attribute rules for more information.
The following requirements must be met to use the Update Is Connected tool:
- The Input Utility Network parameter must be referencing the default branch version.
- When working with an enterprise geodatabase, the connected ArcGIS Enterprise portal account must be the portal utility network owner.
- When working with an enterprise geodatabase, the Input Utility Network parameter must be from a utility network service.
- The network topology must be enabled.
To identify isolated features, complete the following steps:
- On the Analysis tab, click Tools to open the Geoprocessing pane.
- In the Geoprocessing pane, search for and select Update Is Connected.
- For the Utility Network parameter, specify a utility network.
- Click Run.
The Is connected attribute is updated for network features based on their connectivity to a subnetwork controller. The Last Update Is Connected Time property is updated for the utility network on the Network Properties tab.
To quickly identify isolated features, run the Select By Attribute tool on each class, specifying a WHERE clause: Is connected is equal to False. If there are unexpected results, ensure the network topology was recently validated.