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
SYNOPSIS
v.net.alloc
v.net.alloc help
v.net.alloc [-g] input=string output=string [type=string[,string,...]] [afield=integer] [nfield=integer] [afcol=string] [abcol=string] [ncol=string] ccats=string
Flags:
- -g
- Use geodesic calculation for longitude-latitude locations
Parameters:
- input=string
- Name of input vector
- output=string
- Name of output vector
- type=string
- Arc type
- Options: line,boundary
- Default: line,boundary
- afield=integer
- Arc field
- Default: 1
- nfield=integer
- Node field
- Default: 2
- afcol=string
- Arc forward/both direction(s) cost column (number)
- abcol=string
- Arc backward direction cost column (number)
- ncol=string
- Node cost column (number)
- ccats=string
- Categories of centres (points on nodes) to which net will be allocated, field for this categories is given by nfield 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
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.iso
v.net.steiner
v.net.salesman
AUTHOR
Radim Blazek, ITC-Irst, Trento, Italy
Last changed: $Date: 2003/08/09 15:29:16 $
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