EP 1725835 A1 20061129 - METHOD FOR LOCATING DIFFICULT ACCESS POINTS ON A MAP
Title (en)
METHOD FOR LOCATING DIFFICULT ACCESS POINTS ON A MAP
Title (de)
VERFAHREN ZUM FINDEN SCHWIERIGER ZUGANGSPUNKTE AUF EINER KARTE
Title (fr)
PROCEDE DE REPERAGE, SUR UNE CARTE, DE POINTS DIFFICILES D'ACCES
Publication
Application
Priority
- EP 2005050770 W 20050223
- FR 0402870 A 20040319
Abstract (en)
[origin: US2007150121A1] The locating of difficult access points, on a topological map of the zone overflown by an aircraft, plotted on the basis of a map of curvilinear distances taking account of the vertical flight profile of the aircraft, is effected by analyzing the map of curvilinear distances, by means of a chamfer mask cataloging the approximate values C(V) of the Euclidean distances separating a point C<SUB>00 </SUB>of the map from its nearest neighbors V, so as to extract therefrom, at each point C<SUB>00 </SUB>of the map of curvilinear distances, the discrepancies 1DT(V)-DT( 0 ) 1 of curvilinear distances separating the point considered C<SUB>00 </SUB>from its nearest neighbors V, compare these discrepancies 1DT(V)-DT( 0 ) 1 with the approximate values C(V) of the Euclidean distances of the chamfer mask and describe the point considered as difficult of access when a difference is noted between Euclidean distance and discrepancy of curvilinear distances. This locating proves to be useful for signaling the reliefs that are not accessible by a shortest path but are accessible after detour.
IPC 8 full level
G01C 5/00 (2006.01); G01C 21/00 (2006.01)
CPC (source: EP US)
G08G 5/04 (2013.01 - EP US)
Citation (search report)
See references of WO 2005100912A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
US 2007150121 A1 20070628; US 7587272 B2 20090908; EP 1725835 A1 20061129; FR 2867851 A1 20050923; FR 2867851 B1 20060526; IL 177823 A0 20061231; WO 2005100912 A1 20051027
DOCDB simple family (application)
US 59340405 A 20050223; EP 05708051 A 20050223; EP 2005050770 W 20050223; FR 0402870 A 20040319; IL 17782306 A 20060831