If I understand correctly, there is an algorithm in place whereby Agisoft upon decimating the project will look at neighboring vertices to determine how many points should be retained - ie - more points in areas where large changes on the axis. For the purposes of aerial surveying, this would generally be with respect to large changes in elevation.

I have a contact who has requested a point cloud with one point per 20 cm (whether he is implying squared or cubed I am unsure - lets assume it is cubed). This is generally how he determines the level of accuracy that he would like to have for the given area.

In Agisoft I dictate the number of faces to retain when decimating the mesh, however, this is difficult to convert into a measured distance between pixels that may be requested. Is there some other way to communicate the level of accuracy of the point cloud? The number of faces will provide very different accuracy dependent upon the area included.

I do believe that the algorithm that Agisoft uses would produce a much better result with an average of every 20cm than a point every fixed 20cm. I am not arguing the method - just the communication of the results.

Any ideas or tips here would be appreciated.

Thanks.