v.net.bridgegrass - Online in the Cloud

PROGRAM:

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 [arc_layer=string] [node_layer=string]
[arc_column=name] [arc_backward_column=name] [node_column=string] method=string
[--overwrite] [--help] [--verbose] [--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 access 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 access 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 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.

EXAMPLES

TBD

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