Joaquim, > > For the rec, VS2010 and a quite recent trunk version.
Ah, this is the reason for the different results we got. On Windows, atof("nan") returns 0... but on Linux it returns a nan number. I've pushed quite a few changes to trunk to improve the situation on Windows and other changes for all platforms to fix the case when we compare pixel values to nodata value and the nodata value is nan. Indeed, the test "value == dfNoDataValue" that was generally used fails if value == nan and dfNoDataValue == nan, because nan != nan... See http://trac.osgeo.org/gdal/ticket/3576 Best regards, Even _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev