[gdal-dev] Default GeoTransform for MEM driver

Jukka Rahkonen jukka.rahkonen at mmmtike.fi
Sun Dec 8 21:27:15 PST 2013


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-





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