It depends on the kind of drone technology and ground control you’re using. For a traditional drone (e.g., non-PPK/RTK), and 10 AeroPoints, you can expect to get a 3D survey accurate down to 3/10ft (9cm). With the Propeller PPK solution, you can achieve uniform 1/10ft (3cm) accuracy with only one AeroPoint, (if you follow our recommended best practices) .