Contents
How are barriers used in a network analysis?
Barriers are feature classes in network analysis layers that restrict or alter costs of the underlying edges and junctions of the associated network dataset. Barriers are split into three geometry types (point, line, and polygon) and are designed to model temporary changes to the network.
What are the steps in creating a network dataset?
There are five main steps in creating a network dataset: Prepare the feature dataset and sources. If you are creating a geodatabase-based network dataset, all feature classes participating as sources in a network should be present in one feature dataset.
How to create a geodatabase-based network dataset?
Prepare the feature dataset and sources. If you are creating a geodatabase-based network dataset, all feature classes participating as sources in a network should be present in one feature dataset. If you’re creating a network from shapefiles, you need to organize into the same folder all the feature classes that will participate as sources.
How is a restriction polygon barrier used in a network?
A restriction polygon barrier prohibits travel anywhere the polygon intersects the network. One use of this type of barrier is to model floods covering areas of the network and making road travel there impossible. The left side depicts the shortest path between two points.
When does a barrier intersect layers it is true?
This is true even when a barrier intersects layers that are unchecked on the Network Locations tab.
How is the location of a point barrier determined?
When a point barrier is loaded or created, it snaps to the nearest network edge or junction within a search tolerance. The position of the barrier on the network is specified by the network location fields (SourceID, SourceOID, SideOfEdge, and PosAlong).
How can I edit the attributes of a barrier?
Barriers have attributes that can be examined and edited through an attribute table where all the barriers and their attributes in that barrier class are listed, or through a barrier’s Properties table where only one barrier and its attributes are listed at a time.