NAME¶
v.net.bridge - Computes bridges and articulation points in the
network.
KEYWORDS¶
vector, network, articulation points
SYNOPSIS¶
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
DESCRIPTION¶
v.net.bridge finds bridges and articulation points in a network.
NOTES¶
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: articulation point.
The output of the module contains the selected features. If
method=bridge
then lines corresponding to bridges are copied from the input map to the
output map. On the other hand, if
method=articulation then point are
created on the positions of articulation points.
In GRASS,
line is not always a single line segments. 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.
EXAMPLES¶
SEE ALSO¶
v.category,
AUTHORS¶
Daniel Bundala, Google Summer of Code 2009, Student
Wolf Bergenheim, Mentor
Last changed: $Date: 2011-11-08 10:42:51 +0100 (Tue, 08 Nov 2011) $
Full index
© 2003-2011 GRASS Development Team
