当汽车在开行当中时，跟踪设备用三个或四个GPS卫星以三角形定位，然后持续地通过无线电数字传输目标所在的坐标位置。
As the target drives around, the tracking device triangulates its position from three or four GPS satellites, and digitally transmits its coordinates continuously by radio.
三角测量通过以分别作（顶点）的两个已知点和一个未知点形成一个三角形，来求出或定位该未知点，如在航海中。
The location of an unknown point, as in navigation, by the formation of a triangle having the unknown point and two known points as the vertices.
提出了一种适用于球面三角形网格的启发式点定位策略。
A heuristic strategy is presented to solve the point location problem in spherical triangulation mesh.
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