I find it difficult to fly anywhere near no-fly zones because I do not know where I can and cannot take off. It would be nice to see if I am only a few hundred feet from the no-fly zone boundary before and during a flight.
check out the drone assist app
The “Geo Zone” option of DJI Go or DJI Fly will show you exactly where the boundaries are.
The DJI geo-zone map is here >>