Recommended number of control points - control point density

RE: Recommended number of control points - control point density

Oto — Fri, 20 Jan 2023 11:36:15 GMT

You could use less GCPs if you have RTK GNSS and also reusing calibration from 3D flights for Nadir only.

Contextcapture doesn't adjust camera calibration based on GCPs so if The model appears to be curved instead of being horizontal after AT without GCPs then trying to warp it flat using GCPs will result in lower quality and requiring more points than running with good calibration as less re-warping is needed. So try to reuse calibration only which after AT look good and flight paths are flat.

RE: Recommended number of control points - control point density

Anders Theodorsson — Tue, 17 Jan 2023 06:31:18 GMT

Thank you for guiding me to that document! In fact I did find it late last night myself and it turns out I've seen something similar explained somewhere els, with some drawings aswell. Don't know where, but that's not so important since the manual you pointed out here gives the answer too.

Thanks a lot!

RE: Recommended number of control points - control point density

Bruneau St-Jean — Mon, 16 Jan 2023 21:07:54 GMT

What you are looking for can be found in the "Drone Capture Guide" (pdf file) Page 4. This document can be found in C:\Program Files\Bentley\ContextCapture\doc