[gdal-dev] Possible statistics computation issue

Even Rouault even.rouault at mines-paris.org
Fri Feb 10 10:37:46 EST 2012

Selon Alex Speder <alex.speder at gmail.com>:

> Greetings all,
> I recently attempted to update a Java project from GDAL 1.8.1 to GDAL
> 1.9.  However, I noticed the statistics being computed on my output
> rasters were off.  After doing some digging, it seems that something
> changed in the HFA driver's handling of minimum and maximum values.
> IN GDAL 1.8.1 I could set a Float32 raster's NoData value to
> Float.NEGATIVE_INFINITY and it would work as expected, i.e. pixels
> with NoData values were ignored.  This no longer appears to be the
> case in GDAL 1.9.  I have only seen this behavior with
> (although with positive infinity the problem is reversed).  Is this
> the intended behavior?

No, this is a regression. I've created ticket
http://trac.osgeo.org/gdal/ticket/4506 and pushed a fix (as well a new
regression test for that use case). Thanks for your report.

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