[Contextcapture U15 ] New aerotriangulation positioning mode management

Finally there is a aerotriangulation positioning mode management with enhanced control for adjustment and rigid registration steps so RTK flight data can now be fully used.

Here are the reports using different aerotriangulation approaches from DJI P4 RTK flight. 

Flight: Double grid with angled camera

Reports:

GCP-only: Aerotriangulation only on GCPs. GCP surveyed using RTK/PPK instrument.

RTK-only: Aerotriangulation using RTK only and use GCPs as checkpoints

RTK+GCP: New option in CC U15 using 1 or several ground control points and/or user tie-points constraints and accurate initial photo positions (RTK/PPK)

*opt: Same but keeping existing calibration from good 3D flight improving accuracy.

PDFs:

 https://files.fm/u/8pkhs623