dongtang6681 2012-10-01 14:17
浏览 53

如何使用Google Maps API v3在地图上显示多个城市

i've a list of cities in php like:

$cities = array(0=>"Absecon,NJ",1=>"Alamogordo,NJ",2=>"Atlantic city,NJ....);

i have to show all my cities on maps, is possible if i don't have lat and lon?

i initialize maps in this way:

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
    <style type="text/css">
      html { height: 100% }
      body { height: 100%; margin: 0; padding: 0 }
      #map_canvas { height: 100% }
    </style>
    <script type="text/javascript"
      src="http://maps.googleapis.com/maps/api/js?key=MY_API_KEY&sensor=true">
    </script>
    <script type="text/javascript">
      function initialize() {
        var countries = '<?php echo json_enconde($cities);?>';
        var mapOptions = {
          center: new google.maps.LatLng(-34.397, 150.644),
          zoom: 2,
          mapTypeId: google.maps.MapTypeId.ROADMAP
        };
        var map = new google.maps.Map(document.getElementById("map_canvas"),mapOptions);
      }
    </script>
  </head>
  <body onload="initialize()">
    <div id="map_canvas" style="width:100%; height:100%"></div>
  </body>
</html>
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  • douhuanglou1445 2012-10-01 14:25
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    Those don't look like "countries" to me, your examples seem to be cities or towns in the United States (as you indicated in the title).

    The Geocoding web service will return geographic coordinates for a place name, but is subject to a quota and rate limits.

    The usual advice is to geocode your places off-line, store the resulting coordinates and use those to display the map.

    Here is an article from the documentation on geocoding strategies.

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