I have uploaded a map with a clear conical dirt pile to PIX4D cloud. The quality report is excellent and the point cloud is clear. I have tried to measure the volume in two ways. First, from the 3D view I trace the base of the pile. The volume computaion results are as follows:
Area: 3,603 sq ft
Projected Area: 3,572 sq ft (makes sense - slight slope to the base ground)
Volume: 940 cu yards (the pile is about 9 feet high so this is a ballpark reasonable number)
If I then on the same map go to the 2D "MAP" view and use the volume measurement tool there to trace and measure the same pile, I get:
Area: 3,552 sq ft (this is consistent with the above)
Volume: 34,124 cu yards!!! Not possible - this would correspond to a cylinder about 100 yards tall!
What is going on here? Same map, same dirt pile.
Here is the map in question: