METHOD FOR LOCATING DIFFICULT ACCESS POINTS ON A MAP

摘要

The invention concerns a method for locating difficult access points on a topological map or a zone flown over by an aircraft, plotted from a map of curvilinear distances taking into account the vertical profile of the aircraft flight which consists in analyzing the curvilinear distance map, using a chamfer mask indexing approximate values C(V) of the Euclidean distances separating a point C00 of the map from its nearest neighbours V, to extract therefrom, in each point C00 of the map of curvilinear distances, the differences IDT(V)-DT(0)l of the curvilinear distances separating the C00 point concerned from its nearest neighbours, comparing said differences IDT(V)-DT(0)l with approximate values C(V) of the Euclidean distances of the chamfer mask and qualifying the point concerned as being difficult of access when a difference is observed between Euclidean distance and difference of curvilinear distances. Said tracking is useful for signalling reliefs non accessible by the shortest path but accessible through looping.