Method of labelling a highly curved path on a map rendered...

G - Physics – 09 – B

Patent

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G09B 29/10 (2006.01) G09G 5/373 (2006.01) G09G 5/38 (2006.01) H04W 88/02 (2009.01) G01C 21/32 (2006.01)

Patent

CA 2581696

In displaying a map on a wireless communications device, a method is provided that resolves labelling of sharp curves. The method entails a determination of whether a curvature of a map element associated with the map feature exceeds a predetermined threshold (e.g. whether a rate of change in slope of a path or the change in angular orientation of each successive character in the label exceeds a threshold that is a function of zoom level. If the curvature exceeds the threshold, the label is rendered on the map in a new map location that avoids the map location where the curvature exceeds the threshold.

Lors de l'affichage d'une carte sur un dispositif de communication sans fil, une méthode est prévue pour résoudre l'étiquetage de courbes nettes. La méthode consiste à déterminer si une courbure d'un élément de carte associée à la caractéristique de carte dépasse un seuil prédéterminé (p. ex., si un taux de changement dans la pente d'un trajet ou le changement de l'orientation angulaire de chaque caractère successif dans l'étiquette dépasse un seuil qui est une fonction d'un niveau de zoom). Si la courbure dépasse le seuil, l'étiquette est affichée sur la carte dans un nouvel emplacement géographique qui évite l'emplacement géographique où la courbure dépasse le seuil.

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