Hi I am new to Pix4dmapper, I flew my phantom yesterday and surveyed the site, I have a known manhole CL that united utilities have given me, is it possible to tie the known level in the post project plan which should then in theory enable me to pick up the unknowns in the area or is this not possible. I am using the free trial at the moment.
Welcome to the Pix4D Community .
If I understand your question correctly, you would like to use Manholes as Ground Control Points, (GCPs), is this correct?
Normally, it is recommended to have GCPs on punctual features and not on surfaces (like a manhole), as trying to always mark the center can be quite difficult at all zoom levels (assuming the manhole has no feature on it showing its center or any other point where the known position is referring to).
You can find additional information about GCPs here:
Thanks for that Daniele,
I am only generating a close proximity for planning purposes so it will be fine and thanks for the information, I managed to get what I needed.
Thank you for letting me know that you have found what you need.
Let me know if you need anything else.