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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

SEE ALSO

        v.net, v.category,

AUTHORS

       Daniel Bundala, Google Summer of Code 2009, Student
       Wolf Bergenheim, Mentor

       Last changed: $Date: 2013-05-23 21:59:24 +0200 (Thu, 23 May 2013) $

SOURCE CODE

       Available at: v.net.bridge source code (history)

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       © 2003-2019 GRASS Development Team, GRASS GIS 7.6.1 Reference Manual