Vertical and horizontal accuracy of point cloud?

[photoscan_user]

What is theoretical vertical and horizontal accuracy of point cloud without using GCP points (just using GPS positions of images from UAV)?

How it depend on camera model, flight height, image overlap, UAV GPS accuracy?

[JMR]

Hello:
From my experience you cannot rely on regular any UAV on board gps unless it can deliver precise positioning by means of diferential GPS corrections. Not at all.
Not to mention many UAVs tagg photos with altitude over home (not over ellipsoid or sea level) in round meters.