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How are water mains maintained in an ArcGIS network?
The water main’s corresponding tables in the logical network are created and maintained by ArcGIS. When edits are made to the water main in the geometric network, ArcGIS automatically updates the corresponding elements in the logical network, and connectivity between features in the geometric network is maintained.
How is a logical network used in a geometric network?
The logical network allows the geometric network to quickly discover and model the connectivity relationships between connected edges and junctions in a geometric network during editing and analysis. This allows fast network tracing and facilitates the generation of on-the-fly connectivity while editing.
Which is an example of a junction in a geometric network?
There are two types of junctions in a geometric network: User-defined junctions —Junctions that are created based on a user’s source data (point feature classes) when the geometric network is first established. Examples of junctions are service points, fuses, stream gauges, or taps.
How is a water main represented in a geometric network?
The following graphic shows how a water main, represented by a single complex edge in the geometric network, comprises multiple elements in the logical network. The water main’s corresponding tables in the logical network are created and maintained by ArcGIS.
Can a flow direction be set in ArcGIS?
Since ArcGIS deals with general networks (and not with domain-specific types of networks), this information is not used to set the flow direction. Thus, the flow direction can be set to indeterminate for some edges in these networks. A set of similar variables exists in every domain.
Which is an example of a sink feature?
Sinks are junction features that pull flow toward themselves from the edges in the network. For example, in a river network, the mouth of the river can be modeled as a sink since gravity drives all water toward it. Flow moves away from sources or toward sinks.
When to use ArcGIS in a geometric network?
When edits are made to the water main in the geometric network, ArcGIS automatically updates the corresponding elements in the logical network, and connectivity between features in the geometric network is maintained. Networks are often used to model real-world systems where the direction of movement through the network is well-defined.