I want to implement my own GPS navigation for a quad-copter. I can calculate and filter the GPS coordinates (latitude and longitude in degrees).
I believe the easiest approach for me would be, to calculate the change of the heading of the quad-copter from the current attitude to the destination point and let it fly straight on after turning.
However I am not sure about the 2D representation of the latitude/longitude-GPS coordinates (for a round earth to a 2D map system when calculating the heading change). How big is the expected error? Or is there none?