It is a little off topic but I thought many of the forum goers might find the Photosynth to 3D process I've been working on useful for creating 3D models from aerial photos. The process is pretty simple and FREE:
· Gather images with a lot of overlap (like most of our aerial shots)
· Use this exporter to extract the point cloud http://pspcexporter.codeplex.com/
Here are two examples from my work in Ecuador and West Texas:
http://www.youtube.com/user/mdwillis01#p/u/6/nJgvLll57f0 (only part of this one was done with Photoysnth).
The images were captured from kite and balloon platforms but the same workflow should work for any series of photographs.
Also, here is a Google Earth file with some of the same data http://220.127.116.11/~mwillis/Puchara_Grande.kmz (~10 Mb). My linux box connection is slow. It'll take a bit to download.
The 410 nadir photographs covered an area of __________ hectare/acre? Also what was the altitude, the megapixel spec of camera used, and camera model/make? Thanks.
Roger, The 410 photos covered an area of about 20 acres with the camera flying at about 40 meters above the ground. The landscape was rugged, covered in cactus, thorny brush, and rattle snakes. Much larger areas can be flown under better conditions or with the camera at a greater height. My main focus was to document small archaeological features. Flying t0o high would have lost a lot of detail in the imagery. It's always a give and take in this regard.
I used a Canon A590 running CHDK. You can find the specs of the camera at www.depreview.com
Hope that helps.
I'm more interested on "near" ground imagery too.
Thanks for the info.