[gdal-dev] Overviews stored in ESRI aux files

[Frank Warmerdam]

Jason Beverage wrote:
> Hi all,
> 
> I've got a customer that has GeoTiff data with overviews stored in an 
> aux file.  When loading these files in ArcGIS, the files look fine.  
> However, when I load them into our GDAL based application or OpenEV, the 
> images do not render properly and have an overall green or blue tint to 
> them until you zoom into the highest level of detail when GDAL hits the 
> tif file directly.
> 
> Deleting the aux files and regenerating the overviews using gdaladdo 
> causes the images to render correctly.
> 
> Is there any known limitation or issues with GDAL using overviews 
> generated by ArcGIS in aux files?

Jason,

I have not encountered this issue before.  The only time I've run into
.aux overviews causing problems was when they were for 1bit base layers
in which case ArcGIS created the overviews as 0-255 greyscale.

Best regards,
-- 
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
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