Importance of accurate GPS in bundle block adjustment

[Ingsayyad]

I am just wodering about the importance of accuracy of GPS in bundle block adjustment done by PhotoScan.
we will use HERE+RTK GNSS Set for the positioning of UAV which claims cm accuracy.

Does any one have experience with that (HERE+RTK GNSS) and estimated  its accurcy (cm??)?.

Do I have to bother about accuracy of (HERE+RTK GNSS) if I am using 8 well-distributed controll points.

Is there any other better positioning system in the market for UAV?

[SAV]

Hi Ingsayyad,

If you use a sufficient number of well distributed GCPs and survey them using a cm accuracy RTK/PPK GNSS, then you don't have to bother about the accuracy of your UAV/camera locations at all.

Note that even if you use a UAV that has RTK/PPK capabilities, some ground control should always be incorporated, if only for QC validation.

All the best.

Regards,
SAV