Sometimes we need to takeoff from higher altitude relative to the ground and/or subject.
In those cases we still need the FLY tab on DD to generate the correct flightpath/crosshatch and overlapping considering the real ground level down on the subject area as if we were to takeoff from the ground and not higher, and this we can do as usual.
The only thing missing is a way to preset the takeoff altitude, so that the drone does not go up in the air the full vertical height, knowing it is starting from a higher ground already, and for this we need a new feature.
We need a 3D crosshatch covering terrain and buildings with flight altitude of 50m AGL.
Our drone is to takeoff from a rooftop already 20m AGL - we need a new field to input this height.
At takeoff the drone should only go 30m up instead of 50m to perform its mission.