Roger Bivand wrote:
Hi,
The code for the LAN/GIS driver uses GDT_Int16 for Pixel type 2, rather
than GDT_UInt16. Is this justified? A user of rgdal has a case of
unsigned 16-bit data stored by "a forest landscape model", being treated
by the driver as signed. The header does not seem to have a
signed/unsigned flag. Is this a problem of ambiguity in use of a
(closed?) specification, or should the driver be using GDT_UInt16?
I'm asking on the list first, because this may be ambiguity, not a bug.
Roger,
The only specification information I have on the format does not indicate
whether 16bit values should be treated as signed or unsigned. If you are
confident that it should be treated as unsigned file a ticket and we will
fix it - hopefully this won't just break it for someone else!
Best regards,
--
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up | Frank Warmerdam, [email protected]
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush | Geospatial Programmer for Rent
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