javascript实现Haversine公式计算两坐标点距离
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| //javascript实现Haversine公式
/**
* 角度转弧度
* @param {Number} degree
*/
function toRadians(degree) {
return degree * Math.PI / 180;
}
|
…
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/**
* 计算两点之间距离
* @param {*} latitude1
* @param {*} longitude1
* @param {*} latitude2
* @param {*} longitude2
*/
function distance(latitude1, longitude1, latitude2, longitude2) {
// R是地球半径，以㎞为单位
var R = 6371;
var deltaLatitude = toRadians(latitude2-latitude1);
var deltaLongitude = toRadians(longitude2-longitude1);
latitude1 = toRadians(latitude1);
latitude2 = toRadians(latitude2);
var a = Math.sin(deltaLatitude/2) *
Math.sin(deltaLongitude/2) +
Math.cos(latitude1) *
Math.cos(latitude2) *
Math.sin(deltaLongitude/2) *
Math.sin(deltaLongitude/2);
var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
var d = R * c;
return d;
}
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参考: http://www.cocoachina.com/ios/20141118/10238.html