[Help] Large error in GCPs

[ManishSahu]

I have a small project of  <2Km. I have 220 images and 5 GCP points. I have marked 3 as GCP and 2 as check points. However I am getting large error >5m in checkpoints where as <5cm in GCPs. How to process it correctly can anyone tell?

[Ryuseiken]

Hello ManishSahu.
I think the number of GCPs you provided is simply too small.

Just with three GCPs, it is possible to do the geoferencing.
However, it is insufficient for inclusion in the bundle adjustment (Optimise Cameras command).