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US09123178B2 Updating map tiles 有权
更新地图图块

Updating map tiles
Abstract:
The subject matter of this specification can be implemented in, among other things, a computer-implemented method for updating map tiles. The method includes receiving updates to features in geospatial information that describes a map. The map is represented by multiple tiles. The method further includes rerendering at least one tile from the tiles based on the update to generate an individual rerendered instance of the tile. The method further includes storing a tile version identifier and an association between the tile version identifier and the individual rerendered instance of the tile. The method further includes providing the tile version identifier, instructions for using the tile version identifier to send a request for the individual rerendered instance of the tile, instructions for replacing an existing instance of the tile with the individual rerendered instance of the tile, and instructions for ceasing overlaying of a temporary display object on the map.
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