Landing protection status returned by the downward vision sensor.
Enum Members:
NONE
The aircraft is not executing auto-landing or the downward vision sensor has not started to analyze the ground yet.
ANALYZING
The downward vision sensor is analyzing the ground at the landing zone.
ANALYSIS_FAILED
The downward vision sensor's analysis failed. Either the auto-landing can be attempted again, or the user needs to land the aircraft manually.
SAFE_TO_LAND
The ground is flat and the aircraft is safe to land automatically.
NOT_SAFE_TO_LAND
Landing area is not flat enough to be considered safe for landing. The aircraft should be moved to an area that is more flat and an auto-land should be attempted again or the user should land the aircraft manually.