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v.net.bridge - Computes bridges and articulation points in the network.
vector, network, articulation points
v.net.bridge v.net.bridge help v.net.bridge input=name output=name [layer=integer] method=string [--overwrite] [--verbose] [--quiet] Flags: --overwrite Allow output files to overwrite existing files --verbose Verbose module output --quiet Quiet module output Parameters: input=name Name of input vector map output=name Name for output vector map layer=integer Layer number A single vector map can be connected to multiple database tables. This number determines which table to use. Default: 1 method=string Feature type Options: bridge,articulation bridge: Finds bridges articulation: Finds articulation points
v.net.bridge finds bridges and articulation points in a network.
Bridge in a network is an edge/line whose removal would disconnect the (sub-)network. A node is an articulation point if its removal would disconnect the (sub-)network. For more information and formal definitions check the wikipedia entries: bridge and articulation point. The output of the module contains the selected features. For method=bridge, lines corresponding to bridges are copied from the input map to the output map. On the other hand, for method=articulation, points are created on the positions of articulation points. In GRASS GIS, line is not always a single line segment. It might be, and often is, a sequence of line segments between two intersections. Also, articulation point is a standard graph theoretic terminology which is slightly misleading in GRASS. An articulation point in graph theory is an articulation node in GRASS terminology.
Daniel Bundala, Google Summer of Code 2009, Student Wolf Bergenheim, Mentor Last changed: $Date: 2013-05-23 13:01:55 -0700 (Thu, 23 May 2013) $ Full index © 2003-2013 GRASS Development Team