Map tile selection in 3D
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United States of America Patent
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-
Sep 8, 2015
Grant Date -
Dec 5, 2013
app pub date -
Dec 5, 2012
filing date -
May 31, 2012
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Methods and systems are provided for efficiently identifying map tiles of a raised-relief map to retrieve from a server. An electronic device can use estimates of height(s) for various region(s) of the map to determine map tiles that are likely viewable from a given position of a virtual camera. The device can calculate the intersection of the field of view of the virtual camera with the estimated heights to determine a location of the map tiles (e.g., as determined by a 2D grid) needed. In this manner, the electronic device can retrieve, from a map server, the map tiles needed to display the image, without retrieving extraneous tiles that are not needed. Identifying such tiles can reduce the amount of data to be sent across a network and reduce the number of requests for tiles, since the correct tiles can be obtained with the first request.
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Cited Art Landscape
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