Point of interest search along a route

G - Physics – 01 – C

Patent

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G01C 21/34 (2006.01)

Patent

CA 2719702

A system includes a GPS module, user interface module, database and routing engine. To find nearby POIs in one embodiment the routing engine identifies POIs in the database located within a threshold distance from the planned route in Eu-clidean distance. The routing engine filters the results by exploring the road network to determine whether each of the POIs is within the threshold distance of the route in driving distance. The filtering may include exploring outward from the POI, until all roads within the threshold distance are explored or the route is reached; alternatively, distance to the POIs is checked by exploring outward from the route until all roads within the threshold distance of the route have been exposed. For those POIs reached in the exploration, the nearest point on the route and the distance to that point are known. Similar searches are performed based on driv-ing time rather than distance.

Un système comprend un module GPS, un module dinterface utilisateur, une base de données et un moteur de routage. Pour trouver des POI proches dans un mode de réalisation, le moteur de routage identifie des POI dans la base de données situés à une distance seuil de la route prévue à une distance euclidienne. Le moteur de routage filtre les résultats en examinant le réseau routier pour déterminer si chacun des POI se trouve dans la distance seuil de la route à distance de conduite. Le filtrage peut comprendre lexamen à lextérieur du POI, jusqu'à ce que toutes les routes à la distance seuil soient examinées ou que la route soit atteinte ; en variante, la distance aux POI est vérifiée en examinant à lextérieur de la route jusqu'à ce que toutes les routes à la distance seuil de la route aient été découvertes. Pour ces POI atteints lors de lexamen, le point le plus proche sur la route et la distance à ce point sont connus. Des recherches similaires sont effectuées en se basant sur le temps de conduite plutôt que sur la distance.

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