[ContextCapture] Error of Aerotriangulation submitting process

RE: [ContextCapture] Error of Aerotriangulation submitting process

cyc333 — Sat, 25 Aug 2018 17:01:22 GMT

did you solve the problem?

can you tell the right way?

RE: [ContextCapture] Error of Aerotriangulation submitting process

Nguyen Vu — Mon, 23 Nov 2015 06:18:52 GMT

Hi Felix,

We have tried to use Multi-pass in Estimation policies. However it was fail,maybe it required more Ram memory than the normal process, I will try it later !

Here is our latest 3D model of a new urban area and it has a small error : a coner of villa block has wrong elevation, lower than earth surface. We took large number of nadir photos (height: 60 meters), and fewer oblique photos (height: 100 meters), I wonder if the difference of camera altutide was the reason of error .

Do you have any idea ?

Thanks.

RE: [ContextCapture] Error of Aerotriangulation submitting process

Felix James — Mon, 16 Nov 2015 09:59:49 GMT

Hi Nguyen,

Its not clear why this happened. You may just have been unlucky (or hit a glitch) with the first try, and lucky with the second try (if you used the exact same version of ContextCapture on each attempt).

Some part of the algorithm uses random selection of keypoints during the aerotriangulation step. When the dataset is “easy”, it doesn’t affect the results, but when the viewing angles and resolution from the obliques and nadir are quite different, it can be effective.

We would recommend that you use the “mutli-pass” option for the “Optical properties estimation mode” in the AT settings.

This will help the software during the AT step doing a better match for difficult datasets.

RE: [ContextCapture] Error of Aerotriangulation submitting process

Nguyen Vu — Mon, 16 Nov 2015 03:55:49 GMT

I have another question: In Aerotriangulation submitting process, an area's photogroups were used normally; but when I add new photogroups and resubmit aerotriangulation, all off the old photos can not be used (all photogroups include photos of the same neighbor area, were taken at the same day) . Does ContextCapture Center has any advance request ? ( lattitude similarity, lightly similarity.., ext..)