js计算两经纬度点之间的距离

时间 2020-01-18 标签 js 计算两经纬度点之间距离

 
       
 
 
      function caculateLL 
  (lat1 
  , lng1 
  , lat2 
  , lng2 
  ) 
  { 
 
 
  var radLat1 
  = lat1 
  * Math 
  .PI 
  / 
  180.0 
  ; 
 
 
  var radLat2 
  = lat2 
  * Math 
  .PI 
  / 
  180.0 
  ; 
 
 
  var a 
  = radLat1 
  - radLat2 
  ; 
 
 
  var b 
  = lng1 
  * Math 
  .PI 
  / 
  180.0 
  - lng2 
  * Math 
  .PI 
  / 
  180.0 
  ; 
 
 
  var s 
  = 
  2 
  * Math 
  .asin 
  (Math 
  .sqrt 
  (Math 
  .pow 
  (Math 
  .sin 
  (a 
  / 
  2 
  ), 
  2 
  ) 
  + Math 
  .cos 
  (radLat1 
  ) 
  * Math 
  .cos 
  (radLat2 
  ) 
  * Math 
  .pow 
  (Math 
  .sin 
  (b 
  / 
  2 
  ), 
  2 
  ))); 
 

   s 
  = s 
  * 
  6378.137 
  ; 
 

   s 
  = Math 
  .round 
  (s 
  * 
  10000 
  ) 
  / 
  10000 
  ; 
 
 
  return s 
 
 
  }; 
 