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, networking
SYNOPSIS
v.net.alloc
v.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]
Flags:
- -g
- Use geodesic calculation for longitude-latitude locations
- --overwrite
- Force overwrite of output files
Parameters:
- input=name
- Name of input vector map
- output=name
- Name for output vector map
- type=string[,string,...]
- Arc type
- Options: line,boundary
- Default: line,boundary
- alayer=integer
- Arc layer
- Default: 1
- nlayer=integer
- 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.salesman
AUTHOR
Radim Blazek, ITC-Irst, Trento, Italy
Last changed: $Date: 2007/05/02 20:15:58 $
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