GeoTIFF alraady includes the option for scale and offset in the "z-direction". But most client tools (including ArcGIS) ignore that tag.
It isn't clear why this information was added to the private GDAL tag.
-Rob
John Caron wrote:
FYI:
Martin Daly and I are discussing adding this tag to the thredds server
geotiffs:
http://www.awaresystems.be/imaging/tiff/tifftags/gdal_metadata.html
this would allow us to put out 8-bit geotiffs, but clients could convert
back to floats, using a scale and offset.
We can specify the units also!!
Any comments on this idea are welcome.
--
____________________________________________________
Rob Raskin raskin@xxxxxxxxxxxx
Jet Propulsion Lab, 300-320 (818) 354-4228
Pasadena, CA 91109 (fax)(818) 393-2718
