[Gdal-dev] GTOPO30 problem

[Frank Warmerdam]

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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