Question answered today . . .

[Sjs]

The problem though is when the drone flies over non flat terrain...so if the drone takes off and flies 100' up in the air, it knows it is 100' above its takeoff point, if it then flies in a perfectly straight line without gaining altitude but it is flying towards a 50' hill......it would have no way of knowing it is only 50' AGL as it flies over the hill and would continue to think it is 100' AGL. So in that scenario, the drone has no way of knowing how high it is off of the ground.

Yes that's exactly what I found. I thought it was my bird recab I'm, compass app still same. But I'm 721 feet above sea level where I take off from , if I set my height to 200 feet I get a gas warning whats up with that,?

 

[UasDriver]

if I set my height to 200 feet I get a gas warning whats up with that,?

? I live ~700ft above sea level, I set my RTH at 200', typically fly ~~ 200 ft, the RC indicates i'm at ~200ft
it only get "confused" < 50ft, guessing the brain switches to "ground" OA and that SW routine doesn't update my RC height so well.