The file, found in computers that had synched with Apple's iPhones and iPads, contained a date-stamped log of the longitude and latitude coordinates of the various locations visited.

这个文件可以在与苹果的iPhone和iPad同步的电脑上发现，这个文件里包含有带有日期的各种访问地点坐标的经纬度。

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SportVU uses the concept behind missile-tracking technology to log the exact location of every player and the ball 25 times per second on X, Y and Z coordinates, leading to millions of data points for NBA teams' resident quants to study.

WSJ: Tracking Technology Goes Back to School