[Gdal-dev] DTED Performance on Windows

Frank Warmerdam warmerdam at pobox.com
Wed Mar 7 15:52:32 EST 2007

Collins, Benjamin wrote:
> All,
> I'm not sure that this is the same issue, but I have seen some pretty
> terrible performance generally on non-byte datasets loaded under
> Windows with the NITF driver.  DTED 2 is such a file.  For me, the
> gdaladdo command took 10x longer for an int16 NITF than for the same
> GeoTIFF reduced to byte depth.


gdaladdo goes into a much more generic double precision case for
non-eight data, so that might be part of the issue, but I'm surprised
the difference is so dramatic.

Best regards,
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | President OSGeo, http://osgeo.org

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