NAME
v.transform - Transforms an vector map layer from one coordinate system into another coordinate system.
SYNOPSIS
v.transform
v.transform help
v.transform [-qts] input=string output=string [pointsfile=string] [xshift=float] [yshift=float] [zshift=float] [xscale=float] [yscale=float] [zscale=float] [zrot=float]
Flags:
- -q
- suppress display of residuals or other information
- -t
- shift all z values to bottom=0
- -s
- Instead of points use transformation options (xshift, yshift, zshif, xscale, yscale, zscale, zrot)
Parameters:
- input=string
- vector map to be transformed
- output=string
- resultant vector map
- pointsfile=string
- file holding transform coordinates
- xshift=float
- shifting value for x coordinates
- Default: 0.0
- yshift=float
- shifting value for y coordinates
- Default: 0.0
- zshift=float
- shifting value for z coordinates
- Default: 0.0
- xscale=float
- scaling factor for x coordinates
- Default: 1.0
- yscale=float
- scaling factor for y coordinates
- Default: 1.0
- zscale=float
- scaling factor for z coordinates
- Default: 1.0
- zrot=float
- rotation around z axis in degrees counterclockwise
- Default: 0.0
DESCRIPTION
v.transform transforms a vector map layer from one coordinate system
into another coordinate system.
EXAMPLE
Most DXF/DWG drawings are done within XY coordinates. To transform
them to a national grid, we can use 'v.transform' with a 4 point
transformation
v.transform -t in=watertowerXY out=watertowerUTM points=
wt.points zscale=0.04 zshift=1320
SEE ALSO
GRASS 5.7 tutorial pages
AUTHOR
Radim Blazek, ITC-Irst, Trento, Italy
Last changed: $Date: 2004/03/18 09:30:49 $
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