[HOT] Suggestions for Helicopter-based Imagery

[Matthias Meißer]

I'm not an expert but you might be lucky with 2 cams and doing
http://wiki.openstreetmap.org/wiki/Photogrammetry
if your area has different highlevels and your imagery could be disordered.

AFAIK the most would preffer quadcopter drones cause their flight is 
much more stable (that are unavailable for you I guess) but here is a 
nice video showing you the principles:
http://www.mikrokopter.de/ucwiki/VideoAbspielen?id=206

regards
Matthias