Invention Application
- Patent Title: MAP TILE SELECTION IN 3D
- Patent Title (中): 3D地图选择
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Application No.: US13706243Application Date: 2012-12-05
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Publication No.: US20130321411A1Publication Date: 2013-12-05
- Inventor: Aroon Pahwa , Edward Kandrot , Christopher Blumenberg , Jeffrey H. Hultquist , Robert R. Cook , Billy P. Chen , Patrick S. Piemonte
- Applicant: APPLE INC.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Main IPC: G06T15/00
- IPC: G06T15/00

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.
Public/Granted literature
- US09129428B2 Map tile selection in 3D Public/Granted day:2015-09-08
Information query
IPC分类:
G | 物理 |
G06 | 计算;推算或计数 |
G06T | 一般的图像数据处理或产生 |
G06T15/00 | 3D〔三维〕图像的加工 |