Abstract: Accurate mapping of aerodrome OLS (obstacle limitation surface ) is the basis of exact calculation of object height limit in aerodrome clearance area. A calculating method of aerodrome OLS boundary point (intersection point) is proposed, realizing clearance OLS display through OvitalMap. The current method is simple, practical, accurate and efficient, which can intuitively calculate aerodrome OLS boundary point and realize visualization of civil aerodrome clearance management.

Key words: aerodrome clearance, OLS, boundary point, OvitalMap, visualization