[gdal-dev] GDAL Erdas LAN/GIS driver

[Frank Warmerdam]

Roger Bivand wrote:
> 
> (reverting to list)
> 
> Correction, the user reported that:
> 
>> Apparently, gdalinfo retrieves the correct min, max, and statistics, 
>> despite the use of GDT_Int16.
> 
> on his Windows platform. The different GDAL versions ought to explain 
> why his gdalinfo says Int16 but gives statistics from UInt16.
...
> On the trunk, GDT_Int16 is used too, so how does gdalinfo detect that it 
> is actually UInt16?

Roger,

I believe the min/max is actually being read from the file header in trunk
and is handled without regard to the actual imagery or it's type.

I skimmed the changelog for this driver and I didn't notice any obvious
changes in metadata / statistics handling so I'm surprised at this result.

Best regards,
-- 
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
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and watch the world go round - Rush    | Geospatial Programmer for Rent