计算从经纬度到公里和英里的距离

Posted 2021-02-26

Using SQL you can have your database return the distance between 2 sets of Lat and Long points, and using some math functions also take into account the curvature of the earth.

SELECT postcode, (3959*acos((sin(#latitude#/57.3) * sin(latitude/57.3))+ (cos(#latitude#/57.3) * cos(latitude/57.3) * cos((#longitude# - longitude)/57.3))))*8/5 AS exactDistance
 
FROM postcode
 
WHERE 1=1
 
ORDER BY (3959*acos((sin(#latitude#/57.3) * sin(latitude/57.3))+ (cos(#latitude#/57.3) * cos(latitude/57.3) * cos((#longitude# - longitude)/57.3))))*8/5