Jason Roberts wrote:
Given that the .tif itself was not touched, it seems that the statistics were stored in the .aux file. If this is true, do you think ArcGIS will pay attention to the .aux.xml file that GDAL will generate? I don't know much about this stuff so your guess is better than mine.
Jason, I'm not sure - it depends on whether ArcGIS 9.3.1 is using GDAL for GeoTIFF yet or not. I *think* it is, but I am terrible at keeping track of what is in what version. I'd just suggest you try it. BTW, it is *possible* to generate the .aux with GDAL with statistics in it, but it is rather complicated. I think you can do something like: gdal_translate -of HFA -co AUX=YES -co STATISTICS=YES xxx.tif xxx.aux
Also, please disregard my previous claim that ArcGIS 9.3.1 was not able to recognize the NoData value written by the GTiff driver. I got confused about which machine I was using and tested that scenario with ArcGIS 9.1. I can confirm that ArcGIS 9.3.1 does recognize the NoData value properly in the scenario above.
Good - that *suggests* that 9.3.1 is using GDAL for GeoTIFF since the nodata values are stored in the TIFF in a GDAL specific way. Best regards, -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, warmer...@pobox.com light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Programmer for Rent _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
