[Gdal-dev] GTOPO30 problem
Frank Warmerdam
warmerdam at pobox.com
Thu May 6 11:41:48 EDT 2004
Clay, Bruce wrote:
> Frank
> the file in biggest question is E20N90.tar.gz from
> edcftp.cr.usgs.gov/pub/data/gtopo30/global. It looks like all of the
> data sets are Motorola type. The min and max values returned by GDAL
> don't match the min and max values shown in the GTOPO30 documentation.
Bruce,
Gdalinfo was modified March 19th to compute and report exact min/max
values for -mm. Before that it would request the min/max with "approximate
ok" set to TRUE. This means that only a subset of the image would be
sampled to compute the min/max.
So, don't trust the min/max values of older gdalinfo's. A new build from
CVS should give exact results.
Best regards,
--
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I set the clouds in motion - turn up | Frank Warmerdam, warmerdam at pobox.com
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and watch the world go round - Rush | Geospatial Programmer for Rent
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