With the popularity of online maps, based on the map retrieval becomes an important tool, the technology is more mature. People often find target which is certainty on the map, the user submits the keywordscoffee shop, for example,maps will be marked all the cafes, users can also find more information from map. But real life is another requirement; the user wants to find an area, for example, the region havecoffee shop,schoolandhotelthese three kinds of objects.It calls such a query uncertainty area search ...
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