[gdal-dev] Default GeoTransform for MEM driver

[Jukka Rahkonen]

Tim Keitt <tkeitt <at> gmail.com> writes:

> 
> I notice that the "MEM" driver returns {0, 1, 0, 0, 0, -1} by default. Is
this a bug or do some formats flip the vertical axis? If so, what is the
convention for detecting and handling "south up" formats in code?

I guess that anchor point is at the top left corner and therefore the north
coordinate is decreasing step by step when you walk downwards. Document
http://www.gdal.org/gdal_tutorial.html supports my thoughts.

-Jukka Rahkonen-