I was wondering if anyone knows of a device that will trigger an aircraft-mounted DSLR based on GPS coordinates. The purpose is to be able to do reconnoissance-like fly-overs over a piece of land and end up with a film-strip-type image sequences that can be stitched together in Photoshop to create a very high resolution picture of a large piece of property. This is for an architecture friend of mine who has asked for my help. Any ideas? My military connections are on vacation at this time .