CP is control point, GCP is ground control point and the difference is, that GCP has the coordinates in some coordinate system, where CP doesn’t. It is used to merge the data (could also have the coordinates, but after the computation).
CP is control point, GCP is ground control point and the difference is, that GCP has the coordinates in some coordinate system, where CP doesn’t. It is used to merge the data (could also have the coordinates, but after the computation).