标记聚类器

时间:2017-07-13 01:48:13

标签: javascript google-maps marker markerclusterer

我想问一下我的代码是错误还是错误的代码排列。     侧边栏显示,信息窗口也显示。但标记仍然无法聚集。(为什么?)

<!DOCTYPE html  >
<html>
  <head>
    <title>Google Maps</title>

 <script type="text/javascript" src="https://developers.google.com/maps/documentation/javascript/examples/markerclusterer/markerclusterer.js"></script>
 </head>
  <body >



    <table border=1>
      <tr>
        <td>
           <div id="map" style="width: 550px; height: 450px"></div>
        </td>
        <td width = 150 valign="top" style="text-decoration: underline; color: #4444ff;">
           <div id="side_bar"></div>
        </td>
      </tr>
    </table>
    <script type="text/javascript">

      // this variable will collect the html which will eventually be placed in the side_bar
      var side_bar_html = "";

      // arrays to hold copies of the markers and html used by the side_bar
      // because the function closure trick doesnt work there
      var gmarkers = [];


      // A function to create the marker and set up the event window
      function createMarker(point,name,html) {
        var marker = new GMarker(point);
        GEvent.addListener(marker, "click", function() {
          marker.openInfoWindowHtml(html);
        });
        // save the info we need to use later for the side_bar
        gmarkers.push(marker);
        // add a line to the side_bar html
        side_bar_html += '<a href="javascript:myclick(' + (gmarkers.length-1) + ')">' + name + '<\/a><br>';


    return marker;
      }


      // This function picks up the click and opens the corresponding info window
      function myclick(i) {
        GEvent.trigger(gmarkers[i], "click");
      }


      // create the map
      var map = new GMap2(document.getElementById("map"));
      map.addControl(new GLargeMapControl());
      map.addControl(new GMapTypeControl());
      map.setCenter(new GLatLng( 43.907787,-79.359741), 8);

      // add the points    
      var point = new GLatLng(43.65654,-79.90138);
      var marker = createMarker(point,"This place","Some stuff to display in the<br>First Info Window")
      map.addOverlay(marker);

      var point = new GLatLng(43.91892,-78.89231);
      var marker = createMarker(point,"That place","Some stuff to display in the<br>Second Info Window")
      map.addOverlay(marker);

      var point = new GLatLng(43.82589,-78.89231);
      var marker = createMarker(point,"The other place","Some stuff to display in the<br>Third Info Window")
      map.addOverlay(marker);


          var markers = [];

    var markerCluster = new MarkerClusterer(map, markers, {
        imagePath: 'https://raw.githubusercontent.com/googlemaps/v3-utility-library/master/markerclustererplus/images/m2.png',
        gridSize: 10,
        minimumClusterSize: 2
    });


    var mc = new MarkerClusterer(map, markers);                          




      // put the assembled side_bar_html contents into the side_bar div
      document.getElementById("side_bar").innerHTML = side_bar_html;



    </script>
  </body>

</html>

希望有人可以看看这个,感谢您的帮助。谢谢。

1 个答案:

答案 0 :(得分:1)

你遇到了一些问题。

第一个问题:

你不应该使用Content here ... Test 1 2 3 4,因为它自2013年以来一直被弃用。谷歌已经重写了它的地图javascript库,使其更轻巧,兼容移动设备,它是版本3.

V3示例:

gMap2

第二个问题:

数组 var map = new google.maps.Map(document.getElementById("map"), { zoom: 6, center: myLatLng, mapTypeId: google.maps.MapTypeId.ROADMAP }); 为空。您正在正确地创建markers对象,但它已被提供一个空数组。它应该是您希望clusterer对象考虑进行聚类的标记数组。

MarkerClusterer

第3个问题:

您反复重新实例化变量 var markers = []; ... var mc = new MarkerClusterer(map, markers); 。尝试为它们指定不同的名称,例如markermarker1 ...这样您以后可以在代码中引用这些标记。

marker2

第4个问题

这是 MOST 重要的一个。您不应该 EXPOSE 您的Google地图API密钥对公众!这让我有机会对其进行恶意攻击,我相信您可能违反了许可协议。请不要再这样做了。我会修改你的帖子以审查那部分。

这是我之前在JSFiddle中创建的一个聚类器示例。

JSFiddle