Question about adding GCP to an "completed"

[andrekje]

I have made some maps w/o GCP  - now I got GCP's.
how far back in the workflow do I need to go (what to repeat), in order to properly render it with GCP ?
 

[JMR]

import GCP, pin GCP in as many images and press update button in the reference pane. If errors are big (very likely to happen) then you need to use optimize, so dense point cloud and all derivatives have to be killed (so all long operations have to be redone)
GEOBIT