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r.external.1grass

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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