With the existing surface now complete, you can move to the proposed tab to add a Platform to calculate the volume.
Using the ’Platform’ element, draw a boundary around your stockpile base and adjust the level of the platform to the average elevation level at the base. Once your Platform is complete, in the Earthworks panel the listed ‘Platform 1’, change the ’Mode’ to ’Cut’.
The images show (Cubed 2019) 2D and 3D visualisation of the stockpile cut, leaving a flat surface where it once was. In this scenario the stockpile survey becomes the ‘existing surface’ and a flat area is the ‘proposed’. We are asking the program to give us the ‘cut’ if we just excavate the stockpile to a given level with a given perimeter.
The stockpile elevations defined in the existing, will now show reduced to the Platform level, as a result you will find the cut volume (top left-hand corner) which represents the volume of the stockpile.