[GRASS-user] exporting as GTiff
sedwards2 at cinci.rr.com
Tue Oct 10 10:30:00 EDT 2006
I am running into some problems exporting raster files as GTiffs.
These are maps that were acquired as tiff images and georeferenced in
GRASS. When I export them the following dialog occurs:
"Writing format: GTiff
Writing type: UInt16
Input file size is 18310, 7565
0Warning 1: Lost metadata writing to GeoTIFF ... too large to fit in
...10...20...30...40...50...60...70...80...90...Warning 1: Lost
metadata writing to GeoTIFF ... too large to fit in tag.
100 - done."
The metadata was created in GRASS so that message is puzzling.
The resulting file can actually be reimported into the location where
it was created:
"A datum name wgs84 (WGS_1984) was specified without transformation
Note that the GRASS default for wgs84 is towgs84=0.000,0.000,0.000.
Projection of input dataset and current location appear to match.
Proceeding with import...
CREATING SUPPORT FILES FOR gtifftest
COPYING COLOR TABLE FOR gtifftest"
So how does that work? I assume that importing it into another
location would not, and I would not expect it to.
Also, is there a man page or some guidance on selecting the file type
-- if it wasn't for the GIS.m output dialog I would not have known to
use UInt16 and that this is the only format to support a color
table. The createopt and metaopt are similarly cryptic and not
mentioned on the help page. If this is covered in the gdal
documentation, maybe a link on the GRASS help page would take care of
Thanks for any help
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