坐标拾取(百度)
http://api./lbsapi/getpoint/index.html
坐标拾取(腾讯)
/tool/getpoint/
4LFBZ-2Y3WU-PF7VA-4U5JF-3HLK6-7EBJW
计算两坐标之间距离如下
function getDistance($lat_a, $lng_a, $lat_b, $lng_b) {//R是地球半径(米)$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 + $t3));return round($R * $tt);}
JS实现
var radLat1 = rad(latitude);
var radLat2 = rad(sta_latitude);
var a = radLat1 - radLat2;
var b = rad(longitude) - rad(sta_longitude);
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;
// EARTH_RADIUS;
s = Math.round(s * 10000) / 10000;
微信wx.getLocation返回的坐标为GPS定位
GPS定位 转化为腾讯地图坐标
http://apis./ws/coord/v1/translate?locations=39.,117.1257&type=1&key=XXXXXXX
与目标坐标对比
http://apis./ws/distance/v1/?mode=driving&from=39.87,117.132116&to=39.200280,117.133071&key=XXXXXXX