This post will be some of the last practice 3-d photogrammetry I do before the field seasons start. My process for building these is getting pretty refined. This is the most successful model Ive made yet. Im now using a short "painter's pole" to take sets of near-vertical overlapping images. Im using our point-and-shoot canon which works as well for these models as my big SLR, and is easier to work with because the images are smaller. The camera is running an "intervelometer" script that takes a picture every (in this case) 3 seconds. I look like a doofus taking the pictures:
But the results work better than taking photos from eye level. Structure-from-motion programs seem to work best with high angle shots that dont include the horizon. This model of a store house at Be'er Sheva was constructed from 150 overlapping photos. Most were shot as close to vertical as possible, a few shots of the standing column bases included some shots closer to 45 degrees (as always, these look better in full screen mode, and you should click and drag the models around):
And this is a detail of a stone lined basin at Arad:
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