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MAPinfo中使用SQL的Distance函数计算距离
2、 在MapInfo中,Distance函数用于计算两个地理点之间的距离。其格式为:Distance(x1, y1, x2, y2, units)。其中,x1、y1表示第一个点的经纬度,x2、y2表示第二个点的经纬度,units则指定返回距离的单位。通过该函数,可以方便地获取两点间距离。 3、 启动MapInfo,加载两 ...
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