Google Maps Geocoding a string

问题

I have done the geocoding example at:

https://developers.google.com/maps/documentation/javascript/examples/geocoding-simple

I want to be able to geocode a string within my code and place a marker at the location, rather than a user search a location.

My code so far is:

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <title>Geocoding service</title>
    <style>
      html, body, #map-canvas 
      {
        height: 100%;
        margin: 0px;
        padding: 0px
      }
    </style>
    <script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false"></script>
    <script>
   //global variables 
var geocoder;
var map;
var Ireland = "Dublin";

function initialize() 
{
  geocoder = new google.maps.Geocoder();
  var latlng = new google.maps.LatLng(53.3496, -6.3263);
  var mapOptions = 
  {
    zoom: 8,
    center: latlng
  }
  map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
  codeAddress();//call the function
}

function codeAddress() 
{
  var address = document.getElementById("Ireland").value;
  geocoder.geocode( {"Ireland":address}, function(results, status) 
  {
    if (status == google.maps.GeocoderStatus.OK) 
    {
      map.setCenter(results[0].geometry.location);//center the map over the result
      //place a marker at the location
      var marker = new google.maps.Marker(
      {
          map: map,
          position: results[0].geometry.location
      });
    } else {
      alert('Geocode was not successful for the following reason: ' + status);
   }
  });
}

google.maps.event.addDomListener(window, 'load', initialize);

    </script>
  </head>
  <body>
    <div id="map-canvas"></div>
  </body>
</html>

回答1:

This will change the codeAddress function to take an argument and geocode that argument. If you pass the Ireland variable as the argument it will geocode "Dublin".

var Ireland = "Dublin";

function initialize() 
{
  geocoder = new google.maps.Geocoder();
  var latlng = new google.maps.LatLng(53.3496, -6.3263);
  var mapOptions = 
  {
    zoom: 8,
    center: latlng
  }
  map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
  codeAddress(Ireland);//call the function
}

function codeAddress(address) 
{
  geocoder.geocode( {address:address}, function(results, status) 
  {
    if (status == google.maps.GeocoderStatus.OK) 
    {
      map.setCenter(results[0].geometry.location);//center the map over the result
      //place a marker at the location
      var marker = new google.maps.Marker(
      {
          map: map,
          position: results[0].geometry.location
      });
    } else {
      alert('Geocode was not successful for the following reason: ' + status);
   }
  });
}

回答2:

Just Try with this.

 <!doctype html>
    <html lang="en">
    <head>
    <meta charset="utf-8">
    <title>Google Map Address</title>
    <script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>
    <script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>

    <script type="text/javascript">

            var geocoder = new google.maps.Geocoder();
    var address = "Dublin";

    geocoder.geocode( { 'address': address}, function(results, status) {

      if (status == google.maps.GeocoderStatus.OK) {
        var latitude = results[0].geometry.location.lat();
        var longitude = results[0].geometry.location.lng();


        initialize(latitude,longitude);

                } 

        }); 


    function initialize(latitude,longitude) {
        var latlng = new google.maps.LatLng(latitude,longitude);

        var myOptions = {
          zoom: 14,
          center: latlng,
          mapTypeId: google.maps.MapTypeId.ROADMAP,
          mapTypeControl: false
        };
        var map = new google.maps.Map(document.getElementById("map_canvas"),myOptions);

        var marker = new google.maps.Marker({
          position: latlng, 
          map: map, 
            title:"location : Dublin"
        }); 
      }


</script>

    </head>
    <body>

    <h2>Google Map Address</h2>

    <div id="map_canvas" style="width:710px; height:300px"></div>   

            </body>
    </html>

来源：https://stackoverflow.com/questions/21411358/google-maps-geocoding-a-string

标签

javascript

google-maps

google-maps-api-3

geocoding