Hi I have been recommended to use Mapnik to combine two geotiffs, one topogrpahic and one hillshade.
I have managed to do this using an XML mapfile and a short python script, just like in the tutorials. However, I need to create a geotiff output of 132000 by 248000 pixels, even going above 6000 by 6000 i get an out of memory error. So the other way I think I could do it is run the geotiff+hillshade on the smaller original geotiffs which are 4000 by 4000 each. However there are 2000 of them so how can I program mapnik to step through each one rather than write 2000 entries in my map.xml file thanks for your help Tim
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