使用MySQL的geometry类型处理经纬度距离问题的方法

建表

  CREATE TABLE `map` (   `id` int(11) NOT NULL,   `address` varchar(255) NOT NULL DEFAULT '',   `location` geometry NOT NULL,   PRIMARY KEY (`id`),   SPATIAL KEY `idx_location` (`location`)  )

插入

  INSERT INTO map (id, address, location) VALUES (1, 'somewhere', ST_GeomFromText('POINT(121.366961 31.190049)'));

注意必须使用 ST_GeomFromText 函数，且 POINT() 里面是：经度+空格+纬度

查询

1. 查看经纬度

  SELECT address, ST_AsText(location) AS location FROM map;

2. 计算两点之间的距离

  SELECT ST_Distance_Sphere(POINT(121.590347, 31.388094),location) AS distant FROM map;

算出来的结果，单位是米

注意现在POINT()里面经纬度之间是逗号分隔的

3. 查询距离小于1000m的地点，并由远及近排序

SELECT id, address, ST_Distance_Sphere(POINT(121.590347, 31.388094),location) AS distant FROM map WHERE ST_Distance_Sphere(POINT(121.590347, 31.388094),location) < 1000 ORDER BY distant;