使用Google Maps API V3计算当前位置和不同位置之间的距离

Calculate distance between current location and and a different location using Google Maps API V3

本文关键字：位置 之间 距离 Maps Google API V3 计算 使用      更新时间：2023-09-26

我试图计算我的位置和另一个位置之间的距离，但我得到的是NaN。我很确定我把代码放在了脚本中的错误位置。有人能帮我解决这个问题吗?

<!DOCTYPE html>
<html>
<head>
    <script src="http://maps.google.com/maps/api/js?sensor=false&v=3&libraries=geometry"></script>
</head>
<body>
    <p id="demo"></p>
    <button onclick="getLocation()" id="demo">get current location</button>
    <button onclick="console.log(distance)">get ditance from current location to other location</button>
    <script>
        var lat;
        var longt;
        var latLngA = new google.maps.LatLng(lat, longt);
        var latLngB = new google.maps.LatLng(40.778721618334295, -73.96648406982422);
        var distance = google.maps.geometry.spherical.computeDistanceBetween(latLngA, latLngB);
        var x=document.getElementById("demo");
        function getLocation(){
            if (navigator.geolocation){
                navigator.geolocation.getCurrentPosition(showPosition);
            }
            else{
                x.innerHTML="Geolocation is not supported by this browser.";}
            }
        function showPosition(position){
            lat = position.coords.latitude;
            longt = position.coords.longitude;
            x.innerHTML="Latitude: " + lat + "<br>Longitude: " + longt; 
        }
    </script>
</body>
</html>

使用库=geometry简化脚本

function getLocation() {
  navigator.geolocation.getCurrentPosition(
            function(position) {
                var latLngA = new google.maps.LatLng(position.coords.latitude,position.coords.longitude);
                var latLngB = new google.maps.LatLng(40.778721618334295, -73.96648406982422);
                var distance = google.maps.geometry.spherical.computeDistanceBetween(latLngA, latLngB);
                alert(distance);//In metres
            },
            function() {
                alert("geolocation not supported!!");
            }
    );
}
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