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measuring non-flat surface

I would like to measure the surface of a cliff. By definition a cliff is not flat and has a lot of roughness. I tried to draw the surface , but I can only draw a flat surface and not something that stick to my model.

Anyone can help me with this issue?

Hi Jean,

I am afraid, that to measure the surface of the cliff, you would have to use third-party software which allows users to perform a more advanced calculation. You could export your 3D model and measure the surface outside of Pix4D. 

Best

Thank you Beata for your answer.

Which software do you suggest me to use to measure the surface on a 3D model? 

Hi Jean,

Unfortunately, I don’t know any, as this type of expertise was always outside of my work scope.

In this case, I have to give the floor to our users who have sufficient experience in this field.

Best