NAME
v.to.rast - Converts a binary GRASS vector map layer
into a GRASS raster map layer.
(GRASS Vector Program)
SYNOPSIS
v.to.rast
v.to.rast help
v.to.rast input=name output=name
DESCRIPTION
v.to.rast transforms (binary) GRASS vector map
layers into GRASS raster map layer format. Most GRASS
analysis programs operate on raster data.
OPTIONS
Parameters:
- input=name
- Name of the binary vector map layer to be converted.
- output=name
- Name to be assigned to the raster map layer output.
The user can run the program non-interactively by specifying the names of
a vector input file and raster output file on the command line,
using the form:
-
v.to.rast input=name output=name
If the user instead types simply v.to.rast on the
command line, the program will prompt the user to enter
these names.
NOTES
v.to.rast will only affect data in areas lying
inside the boundaries of the current geographic region.
Before running v.to.rast, the user should
therefore ensure that the current geographic region is
correctly set and that the region resolution is at the
desired level; the program may otherwise create an empty
raster map layer. An empty raster map layer will also be
created if the vector map layer has not been assigned
category/attribute labels (e.g., through use of the
v.digit program).
The v.to.rast program creates two files: a raster map layer,
and a history file. The GRASS program
r.support
must be run to
create additional support files for the raster map.
Additional problems sometimes lead to the creation of empty raster
map layers. Unfortunately, error messages explaining these phenomena
do not yet exist.
SEE ALSO
g.region,
r.poly,
r.line,
r.support,
v.digit,
v.import,
v.support
AUTHORS
Michael Shapiro,
U.S. Army Construction Engineering
Research Laboratory