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Geohash根据经纬度计算距离.该怎么处理

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Release： 2016-06-13 11:54:42
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Geohash根据经纬度计算距离.
谁用过geohash.class.php这个查找附近人的类的?

我想问下表Geohash的精确的位数,跟距离有什么关系？我只想在数据库中搜出里我最近的一个坐标点，该如何实现？
------解决方案--------------------
失之毫厘，谬之千里

距离越大偏差越大

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