Note: A new GRASS GIS stable version has been released: GRASS GIS 7. Go directly to the new manual page here
v.net.bridge - Computes bridges and articulation points in the network.
vector, network, articulation points
v.net.bridge input=name output=name [layer=integer] method=string [--overwrite] [--verbose] [--quiet]
- Allow output files to overwrite existing files
- Verbose module output
- Quiet module output
- Name of input vector map
- Name for output vector map
- Layer number
- A single vector map can be connected to multiple database tables. This number determines which table to use.
- Default: 1
- 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:
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) $
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