Sometimes, you see a button called Calculate Volume while on other occasions you see a button called Volume Difference. What is the difference between both and what triggers each button to appear? This article gives some insight.
Calculate Volume is a function that you need when measuring stockpiles while Volume Difference is something you need when you to compare multiple drone surveys, typically for an earthworks project.
Both buttons appear in the Selection tab and become visible when you have selected the proper input items.
1 Terrain state
2 Terrain states
Calculate Volume is a functionality you need when measuring stockpiles. Each stockpile has a value and requires a separate calculation. So, you will have one cut-and-fill map for each pile. Because the piles change form and position, it makes no sense to measure how the piles change over time. You trace a reference surface around the piles for each specific moment in time.
Volume Difference is a functionality you need when you compare multiple drone surveys, typically to monitor an earthworks project from start to finish. With Volume Difference you have one cut-and-fill map for your work area. You pin the cut-and-fill map to all other terrain states so that you can easily monitor progress when you change to a terrain state that represents another moment in time.