v.net.bridge(1grass) GRASS GIS User's Manual v.net.bridge(1grass)
NAME
v.net.bridge - Computes bridges and articulation points in the net-
work.
KEYWORDS
vector, network, articulation points
SYNOPSIS
v.net.bridge
v.net.bridge --help
v.net.bridge input=name output=name [arc_layer=string]
[node_layer=string] [arc_column=name] [arc_backward_column=name]
[node_column=string] method=string [--overwrite] [--help] [--ver-
bose] [--quiet] [--ui]
Flags:
--overwrite
Allow output files to overwrite existing files
--help
Print usage summary
--verbose
Verbose module output
--quiet
Quiet module output
--ui
Force launching GUI dialog
Parameters:
input=name [required]
Name of input vector map
Or data source for direct OGR access
output=name [required]
Name for output vector map
arc_layer=string
Arc layer
Vector features can have category values in different layers. This
number determines which layer to use. When used with direct OGR ac-
cess this is the layer name.
Default: 1
node_layer=string
Node layer
Vector features can have category values in different layers. This
number determines which layer to use. When used with direct OGR ac-
cess this is the layer name.
Default: 2
arc_column=name
Arc forward/both direction(s) cost column (number)
arc_backward_column=name
Arc backward direction cost column (number)
node_column=string
Node cost column (number)
method=string [required]
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 defini-
tions 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.
EXAMPLES
TBD
SEE ALSO
v.net, v.category,
AUTHORS
Daniel Bundala, Google Summer of Code 2009, Student
Wolf Bergenheim, Mentor
SOURCE CODE
Available at: v.net.bridge source code (history)
Accessed: unknown
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GRASS 7.8.7 v.net.bridge(1grass)
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