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v.net.alloc
Langue: en
Version: 372087 (fedora - 01/12/10)
Section: 1 (Commandes utilisateur)
NAME
v.net.alloc - Allocate subnets for nearest centres (direction from centre).Centre node must be opened (costs >= 0). Costs of centre node are used in calculation
KEYWORDS
vector, networkingSYNOPSIS
v.net.allocv.net.alloc help
v.net.alloc [-g] input=name output=name [type=string[,string,...]] [alayer=integer] [nlayer=integer] [afcolumn=string] [abcolumn=string] [ncolumn=string] ccats=range [--overwrite] [--verbose] [--quiet]
Flags:
- -g
Use geodesic calculation for longitude-latitude locations- --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- type=string[,string,...]
Type
Arc type
Options: line,boundary
Default: line,boundary- alayer=integer
Layer number
Arc layer
Default: 1- nlayer=integer
Layer number
Node layer
Default: 2- afcolumn=string
Arc forward/both direction(s) cost column (number)- abcolumn=string
Arc backward direction cost column (number)- ncolumn=string
Node cost column (number)- ccats=range
Category values
Categories of centres (points on nodes) to which net will be allocated, layer for this categories is given by nlayer option
DESCRIPTION
v.net.alloc allocates subnets for nearest centres (direction from centre). Centre node must be opened (costs >= 0). Costs of centre node are used in calculation. Supported are cost assignments for both arcs and nodes, and also different in both directions of a vector line. For areas cost will be calculated along boundary lines.NOTES
Center nodes have to be assigned to vector nodes using v.digit. Nodes and arcs can be closed using cost = -1.EXAMPLE
# nlayer=1 if no extra table for nodes:
v.net.alloc network out=network_alloc ccats=0-13 nlayer=1
# the result has to be selected by category number of the relevant node:
d.vect network_alloc cat=9 col=red
d.vect network_alloc cat=11 col=green
d.vect network_alloc cat=2492 col=yellow
Calculating subnets for 7 centre nodes using cost assigned to vector length
v.net.alloc in=vectmap out=vectmap.alloc ccats=1-7
Calculating subnets for 7 centre nodes using cost assignments in both directions
v.net.alloc in=vectmap afcol=INDEX abcol=INDEXBACK out=vectmap.alloc ccats=1-7
SEE ALSO
d.path, v.net, v.net.iso, v.net.path, v.net.steiner, v.net.salesmanAUTHOR
Radim Blazek, ITC-Irst, Trento, ItalyLast changed: $Date: 2007-05-02 22:15:58 +0200 (Wed, 02 May 2007) $
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