计算两GPS坐标的实际距离

javascript:

function toRadians(degree) {

return degree * Math.PI / 180;

}

function distance(latitude1, longitude1, latitude2, longitude2) {

// R is the radius of the earth in kilometers

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(deltaLatitude/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;

}

 

php:

/**

 * 计算两会标之间的距离(米)

 * @param double $lng_a 经度a

 * @param double $lat_a 维度a

 * @param double $lng_b 经度b

 * @param double $lat_b 维度b

 */

function get_distance($lng_a, $lat_a, $lng_b, $lat_b) {

    //R是地球半径（米）

    $R = 6366000;

    $pk = doubleval(180 / 3.14169);

    

    $a1 = doubleval($lat_a / $pk);

    $a2 = doubleval($lng_a / $pk);

    $b1 = doubleval($lat_b / $pk);

    $b2 = doubleval($lng_b / $pk);



    $t1 = doubleval(cos($a1) * cos($a2) * cos($b1) * cos($b2));

    $t2 = doubleval(cos($a1) * sin($a2) * cos($b1) * sin($b2));

    $t3 = doubleval(sin($a1) * sin($b1));

    $tt = doubleval(acos($t1 + $t2 + $t3));



    return $R * $tt;

}

 

sql:

已知坐标：(116.386294,39.923879)

地球半径：6366000米

SELECT id,Lastlongitude,Lastlatitude,

(6366000 * ACOS( 

(COS(RADIANS(116.386042))*COS(RADIANS(39.923927))*COS(RADIANS(Lastlongitude))*COS(RADIANS(Lastlatitude)))+

(COS(RADIANS(39.923927))*SIN(RADIANS(116.386042))*COS(RADIANS(Lastlatitude))*SIN(RADIANS(Lastlongitude)))+

(SIN(RADIANS(39.923927))*SIN(RADIANS(Lastlatitude)))

)) AS distance

FROM drv_driver_location

HAVING distance<10