以获得精确的位置估计 Position Estimation
记住你碰的精确的位置。
但是这些非常精确的位置信息却并没有存储在手机中的数据库中。
Yet none of these very accurate points were in the dataset that is stored on the phone.
职业冰球和其他运动都开始应用实时视频效果,比如在橄榄球场上根据精确的位置数据给触地得分区加颜色。
NASCAR, the NFL, professional hockey, and other sports apply real-time video effects, such as the colored first-down line in football, based on precise geospatial data.
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