NAME
v.net.iso - Split net to bands between cost isolines (direction from centre). Centre node must be opened (costs >= 0). Costs of centre node are used in calculation
SYNOPSIS
v.net.iso
v.net.iso help
v.net.iso [-g] input=string output=string [type=string[,string,...]] [alayer=integer] [nlayer=integer] [afcolumn=string] [abcolumn=string] [ncolumn=string] ccats=string costs=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
- 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=string
- Category values.
- Categories of centres (points on nodes) to which net will be allocated, layer for this categories is given by nlayer option.
- costs=string
- Costs for isolines
DESCRIPTION
v.net.iso splits net to bands between cost isolines (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
Nodes must be on the isolines.
Center nodes have to be assigned to vector nodes. Nodes and arcs can be closed
using cost = -1.
EXAMPLE
Subdivision of a network into areas:
The map must contain at least one center
(point) on the vector network which can be patched into with
v.patch.
v.net.iso input=streets output=isomap ccats=1 costs=1000,2000,5000
that should cut network to 4 categories:
cat |tion and exit (a dumap
location=string
location containing input vector map
mapset=string
mapset containing input vector map
dbase=string
path to GRASS database of input location
output=string
output vector map
DESCRIPTION
v.proj allows a user to convert a vector map in a specified mapset
of a specified location (different from current) with projection of input
location to the vector map in a current mapset of current location with
projection of current location (both projections are defined by
corresponding PROJ_INFO files).
NOTES
If out is not specifie