谷歌地圖在距離計算器中的當前位置

我有一個小型的網絡應用程序，可以使用谷歌地圖計算2點之間的距離。谷歌地圖在距離計算器中的當前位置

我想獲取用戶當前位置並將其標記在地圖上，而不是預先定義地圖中心（我正在使用當前代碼）。

作爲JS noob，有沒有人可以編輯代碼來幫助我獲得此功能？

謝謝！

<html> 
    <head> 
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no"/> 
    <script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script> 
    <script type="text/javascript"> 

    var directionDisplay; 
    var map; 


function initialize() { 
    directionsDisplay = new google.maps.DirectionsRenderer(); 
    var copenhagen = new google.maps.LatLng(55.6771, 12.5704); 
    var myOptions = { 
     zoom:12, 
     mapTypeId: google.maps.MapTypeId.ROADMAP, 
     center: copenhagen 
    } 

    map = new google.maps.Map(document.getElementById("map_canvas"), myOptions); 
    directionsDisplay.setMap(map); 
    } 


    var directionsService = new google.maps.DirectionsService(); 



    function calcRoute() { 
    var start = document.getElementById("start").value; 
    var end = document.getElementById("end").value; 
    var distanceInput = document.getElementById("distance"); 

    var request = { 
     origin:start, 
     destination:end, 
     travelMode: google.maps.DirectionsTravelMode.DRIVING 
    }; 

    directionsService.route(request, function(response, status) { 
     if (status == google.maps.DirectionsStatus.OK) { 
      directionsDisplay.setDirections(response); 
      distanceInput.value = response.routes[0].legs[0].distance.value/1000; 
     } 
    }); 
    } 

    var showPosition = function (position) { 
    var userLatLng = new google.maps.LatLng(position.coords.latitude, position.coords.longitude); 
    // Do whatever you want with userLatLng. 
} 
navigator.geolocation.getCurrentPosition(showPosition); 
    </script> 

    <title>Distance Calculator</title> 

    <style type="text/css"> 

      body { 
       font-family:Helvetica, Arial; 
      } 
      #map_canvas { 
       height: 50%; 
      } 
    </style> 
    </head> 
    <body> 

    <body onload="initialize()"> 
    <p>Enter your current location and desired destination to get the distance</p> 
     <div> 
      <p> 
       <label for="start">Start: </label> 
       <input type="text" name="start" id="start" /> 

       <label for="end">End: </label> 
       <input type="text" name="end" id="end" /> 

       <input type="submit" value="Calculate Route" onclick="calcRoute()" /> 
      </p> 
      <p> 
       <label for="distance">Distance (km): </label> 
       <input type="text" name="distance" id="distance" readonly="true" /> 
      </p> 
     </div> 
     <div id="map_canvas"></div> 
    </body> 
</html>

來源

2012-10-16 user1749428

試試這個：

if (navigator.geolocation) { 
    navigator.geolocation.getCurrentPosition(function(position){ 
    var latitude = position.coords.latitude; 
    var longitude = position.coords.longitude; 
    var coords = new google.maps.LatLng(latitude, longitude); 
    var mapOptions = { 
     zoom: 12, 
     center: coords, 
     mapTypeId: google.maps.MapTypeId.ROADMAP 
     }; 
     map = new google.maps.Map(
      document.getElementById("mapContainer"), mapOptions 
      ); 
     var marker = new google.maps.Marker({ 
       position: coords, 
       map: map, 

          }); 
     }else { 

     alert("Geolocation API is not supported in your browser."); 

     }

這使你在用戶的當前位置的標記。

來源

2013-01-14 01:44:25 sideroxylon

谷歌地圖在距離計算器中的當前位置

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