About setting flow direction
This topic applies to ArcEditor and ArcInfo only.
While network features can be both created and edited in ArcInfo and ArcEditor, they are read-only in ArcView.
You can use ArcMap to maintain flow direction in your geometric network. ArcMap uses the network connectivity, the enabled or disabled state of network features, and the locations of sources and sinks to establish flow direction.
You must set flow direction whenever you do the following:
- Create a new geometric network.
- Add or remove features from the network.
- Reshape features so as to change the network connectivity.
- Connect or disconnect features.
- Add or remove sources or sinks.
- Enable or disable features.
- Reconcile a version.
Setting the flow direction establishes the correct flow direction for the new network connectivity.
To set flow direction, your network must contain at least one junction feature class that you specified as containing sources and/or sinks.