2D RGB Map vs. Elevation Map
When drones take a photo, the GPS location and altitude data is stored in the image. The stitching software takes the altitude in each image and uses it to create a continuous surface.
Comparing the above volumetric measurement with a Total Station we found it was accurate within 1-2% of the traditional ground-based laser measurement system. The Total Station Operator was amazed and even said “even a Total Station isn’t 100% accurate”.