Amsterdam
The Waag Society has done periodic mapping events and has published a dutch guide on balloon mapping:
Image from Dutch article on a Public Lab Kite Mapping event in Amsterdam, by Waag Society -- and a full PDF version, released CC-BY-SA: cl_special_spelen-leren.pdf
In Sept 2013, Waag is hosting the "Eclectis" program which includes workshops in infrared photography and kite mapping.