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NAME

r.external - Link GDAL supported raster file to a binary raster map layer.

KEYWORDS

raster, import

SYNOPSIS

r.external
r.external help
r.external [-oerf] [input=name] [source=string] [output=name] [band=integer] [title="phrase"] [--overwrite] [--verbose] [--quiet]

Flags:

-o
Override projection (use location's projection)
-e
Extend location extents based on new dataset
-r
Require exact range
-f
List supported formats and exit
--overwrite
Allow output files to overwrite existing files
--verbose
Verbose module output
--quiet
Quiet module output

Parameters:

input=name
Raster file to be linked
source=string
Name of non-file GDAL data source
output=name
Name for output raster map
band=integer
Band to select (default: all)
title="phrase"
Title for resultant raster map

DESCRIPTION

r.external allows a user to link a GDAL supported raster file to a binary raster map layer, from any GDAL supported raster map format, with an optional title. The file is not imported but just registered as GRASS raster map.

EXAMPLES

RGB Orthophoto from GeoTIFF

# import of all channels:
r.external  /home/user/data/maps/059100.tif out=ortho
g.region rast=ortho.3 -p
d.rgb r=ortho.1 g=ortho.2 b=ortho.3
r.composite r=ortho.1 g=ortho.2 b=ortho.3 output=ortho.rgb

SEE ALSO

r.in.gdal, v.external

REFERENCES

GDAL Pages: http://www.gdal.org/

AUTHOR

Glynn Clements

Last changed: $Date: 2008-08-15 08:16:42 +0200 (Fri, 15 Aug 2008) $


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