I'm doing stockpile volume estimates as follows:
1. Process Phantom 4 images using Maps Made Easy
2. Develop contours using QGIS
3. Export contours to *.dxf and import to AutoCAD Civil 3D
4. Create TIN's in Civil 3D, calculate volume and develop a topo map
However, the vertical accuracy compared with my GCP's is poor - around +/- 5 feet over an approximately 5 acre area - even after I adjust using the GCP feature of Maps Made Easy (I used 6 GCP's).
I'm thinking I need a Phantom 4 RTK. Do you agree? Can I process Phantom 4 RTK images in Maps Made Easy? Please advise.