公开(公告)号：US09129428B2

公开(公告)日：2015-09-08

申请号：US13706243

申请日：2012-12-05

Applicant: Apple Inc.

Inventor： Aroon Pahwa ,  Edward Kandrot ,  Christopher Blumenberg ,  Jeffrey H. Hultquist ,  Robert R. Cook ,  Billy P. Chen ,  Patrick S. Piemonte

IPC: G06T17/00 ,  G06T15/00 ,  G06T15/20 ,  G06T17/05

CPC classification number: G06T15/005 ,  G06T15/20 ,  G06T17/05

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.

Abstract translation: 提供了方法和系统，用于有效地识别浮雕图的地图瓦片以从服务器检索。 电子设备可以使用地图的各个区域的高度的估计来确定可能从虚拟相机的给定位置可见的地图瓦片。 设备可以计算虚拟摄像机的视野与估计高度的交集，以确定所需的地图瓦片的位置（例如，由2D网格确定）。 以这种方式，电子设备可以从地图服务器检索显示图像所需的地图瓦片，而不检索不需要的无关瓦片。 识别这样的瓦片可以减少要通过网络发送的数据量并且减少对瓦片的请求数量，因为可以利用第一请求获得正确的瓦片。

公开(公告)号：US20130321411A1

公开(公告)日：2013-12-05

申请号：US13706243

申请日：2012-12-05

Applicant: APPLE INC.

Inventor： Aroon Pahwa ,  Edward Kandrot ,  Christopher Blumenberg ,  Jeffrey H. Hultquist ,  Robert R. Cook ,  Billy P. Chen ,  Patrick S. Piemonte

IPC: G06T15/00

CPC classification number: G06T15/005 ,  G06T15/20 ,  G06T17/05

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.

Abstract translation: 提供了方法和系统，用于有效地识别浮雕图的地图瓦片以从服务器检索。 电子设备可以使用地图的各个区域的高度的估计来确定可能从虚拟相机的给定位置可见的地图瓦片。 设备可以计算虚拟摄像机的视野与估计高度的交集，以确定所需的地图瓦片的位置（例如，由2D网格确定）。 以这种方式，电子设备可以从地图服务器检索显示图像所需的地图瓦片，而不检索不需要的无关瓦片。 识别这样的瓦片可以减少要通过网络发送的数据量并且减少对瓦片的请求数量，因为可以利用第一请求获得正确的瓦片。