Home Location (HL) support (PX4)
PX4 does not support setting HL from UgCS. HL is always automatically set to the current location when vehicle is armed.
UgCS is able to read the current HL form the vehicle and is display it on the map.
Route waypoint altitudes are calculated based on HL altitude. Thus it is crucially important to launch the vehicle from the planned HL. When operating in area with variable terrain altitude make sure the home location is specified correctly in the mission before upload.
Safest way to set correct HL is to set it explicitly at the current vehicle position.
Landing at Home Location
Vehicle behavior (land or do not land) after returning at Home Location depends on the autopilot configuration.