I just took possession of my first drone yesterday. Very impressed so far. My question is with respect to the height shown on the Fly App. Is this measurement the height from where it took off or does it adjust to the grade you are flying over? I.e.: if you are flying in a area where the grade ascends 50' in lets say a distance of 400', does the Fly App still display that you are at a height of 200' if that's where you started from? Thanks for your help!