Run-time label cache for efficient map labelling

Details Run-time label cache for efficient map labelling Run-time label cache for efficient map labelling

H - Electricity

04

W

H04W 88/02 (2009.01) H04W 8/20 (2009.01) G09B 29/10 (2006.01)

Patent

CA 2660475

A wireless communications device has a processor coupled to a memory for reconstructing a map feature from discrete sets of map data that provide redundant labels for the map feature to thereby generate a reconstructed map feature having only a single instance of the label, wherein the memory stores a run-time label cache for caching the reconstructed map feature and the label associated with the reconstructed map feature for reuse in rendering a subsequent map that also includes the reconstructed map feature. As new map data is received for each subsequent map, for example when the map is panned, the reconstructed map feature is modified by trimming off portions of the map feature that have moved outside the area of interest and by stitching to the reconstructed map feature portions of the map feature that have moved into the area of interest.

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