Single drone or multiple? From where you are at - I'd do the following: 1) check out the post and confirm your imagery complies with everything at camera calibration 2) get a subset of your images over a "complex" area - like a building - so all four obliques .. nadir. 3) create a new block - call it "Calibration" will do 4) add photos you have selected from (2) 5) run an AT on the "Calibration" block per the calibration post (1) - so multi-pass on optical calcs - high tie points 6) once that is run - export the optical properties to a file - keep them with your job 7) clone your big existing block - set "additional" parameters to "structured aerial data set" 8) import optical properties on to the new clone 9) run an AT - "Keep camera calibration" .. and set tie points to high 10) how did it go? If you have multiple drones - this needs to be done for each unit and the photos need to be split - each group will have slightly different focal lengths etc - even if the same model of drone. Did you have auto-focus or manual infinity focus? Need infinity - using AF changes the focal length per photos (perhaps) Typically when I have done something like this - I'd do each flight as a separate block - so "Nadir"; "North Oblique" etc .. with the survey control and so on .. Then I merge the blocks and (can) merge the photos groups per drone - and run a final AT. Having said that - sometimes I have _FELT_ (no empirical evidence) - that the separate photo blocks per "mission" (eg per oblique) has resulted in a better mesh .. rather than trying to fudge the final AT - you might like to try a few tiles per and post final merged AT and decide for yourself.
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