[gdal-dev] What should I expect?

[Jorge Arevalo]

Hello,

If while I'm executing gdalinfo against a raster layer I get a
positive value for pixel size Y, what of these scenarios is possible?

- The raster's map coordinate system sets the origin of the data in
the upper left corner.
- The raster is not georeferenced and its coordinates are interpreted
as image pixels, instead of map units.
- Any other situation (corrupt file?, other?)

I know this value is almost always negative. For example, in case of
UTM coordinate system. But, how common is to have a positive value for
Y coordinate?

Many thanks in advance

-- 
Jorge Arevalo
http://www.libregis.org