mysql 計算 給定座標 n米範圍內的 公司地址

select * from (

SELECT id,title,addr,pointX,pointY,(2*ATAN2(SQRT(SIN((24.488935-pointY)*PI()/180/2)   
        *SIN((24.488935-pointY)*PI()/180/2)+   
        COS(pointY*PI()/180)*COS(24.488935*PI()/180)   
        *SIN((118.192988-pointX)*PI()/180/2)   
        *SIN((118.192988-pointX)*PI()/180/2)),   
        SQRT(1-SIN((24.488935-pointY)*PI()/180/2)   
        *SIN((24.488935-pointY)*PI()/180/2)   
        +COS(pointY*PI()/180)*COS(24.488935*PI()/180)   
        *SIN((118.192988-pointX)*PI()/180/2)   
        *SIN((118.192988-pointX)*PI()/180/2))))*6378140 juli
FROM jh_company

) a where a.juli < 5000 order by a.juli asc

 

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#lat爲緯度, lng爲經度, 必定不要弄錯 declare @lng1 float; declare @lat1 float; declare @lng2 float; declare @lat2 float; set @lng1=116.3899; set @lat1=39.91578; set @lng2=116.3904; set @lat2=39.91576;   select (2*ATAN2(SQRT(SIN((@lat1-@lat2)*PI()/180/2)           *SIN((@lat1-@lat2)*PI()/180/2)+           COS(@lat2*PI()/180)*COS(@lat1*PI()/180)           *SIN((@lng1-@lng2)*PI()/180/2)           *SIN((@lng1-@lng2)*PI()/180/2)),           SQRT(1-SIN((@lat1-@lat2)*PI()/180/2)           *SIN((@lat1-@lat2)*PI()/180/2)           +COS(@lat2*PI()/180)*COS(@lat1*PI()/180)           *SIN((@lng1-@lng2)*PI()/180/2)           *SIN((@lng1-@lng2)*PI()/180/2))))*6378140;