Just got a P3 prof for Christmas and have a few questions. 1: Once I set the desired altitude to clear trees does this change with the terrain? (example if I set it to 120 feet to clear trees if I fly up a hill will the drone climb to maintain 120 feet from the ground?) 2: What is the range of the drone if flying on flat ground with no trees or buildings? I would like to check our crops during the spring and summer and some of these fields are 1/2 to 3/4 of a mile. Thanks for your replies.