谷歌地图 - 每个类别的不同标记图标

我试图给每个标记与不同的类别不同的标记图像。在JSON中，我有3个例子都有不同的类别（一，二和三）。谷歌地图 - 每个类别的不同标记图标

目前我有一个标记图像被用于所有，但我想使用类别值来控制图像的URL使用。

我可能正在考虑让url变量插入类别颜色（var url =“http://domain.com/images/marker_”+ [category] +“.png”）。然后我可以将它与开关状态混合在一起，但是就我而言。

对我来说，处理这个问题的最佳方法是什么？

这里是JS我有谷歌地图。我正在使用API的v3。

(function() { 

    window.onload = function() { 


    // Creating a new map 
    var map = new google.maps.Map(document.getElementById("map"), { 
     center: new google.maps.LatLng(30.033591,-36.035156), 
     zoom: 3, 
     mapTypeId: google.maps.MapTypeId.ROADMAP 
    }); 


    // Creating the JSON data 
    var json = [ 
     { 
      "title": "USA", 
      "lat": 37.616552, 
      "lng": -92.988281, 
      "description": "<strong>USA</strong> ...", 
      "category": "one" 
     }, 
     { 
      "title": "France", 
      "lat": 48.372793, 
      "lng": 1.230469, 
      "description": "<strong>France</strong> ...", 
      "category": "two" 
     }, 
     { 
      "title": "UK", 
      "lat": 51.517403, 
      "lng": -0.098877, 
      "description": "<strong>UK</strong> ...", 
      "category": "three" 
     } 
    ] 

    // Custom marker - Need one for each category 
    var image = new google.maps.MarkerImage(
     'http://i.imgur.com/3YJ8z.png', 
     new google.maps.Size(19,25), // size of the image 
     new google.maps.Point(0,0) // origin, in this case top-left corner 

    ); 

    // Creating a global infoWindow object that will be reused by all markers 
    var infoWindow = new google.maps.InfoWindow(); 

    // Marker Clusterer setup 
    var mcOptions = { 
     gridSize: 50, 
     maxZoom: 15 
    }; 
    var markers = []; 

    // Looping through the JSON data 
    for (var i = 0, length = json.length; i < length; i++) { 
     var data = json[i], 
      latLng = new google.maps.LatLng(data.lat, data.lng); 

     // Creating a marker and putting it on the map 
     var marker = new google.maps.Marker({ 
      position: latLng, 
      map: map, 
      title: data.title, 
      icon: image 
     }); 
     markers.push(marker); 


     // Creating a closure to retain the correct data, notice how I pass the current data in the loop into the closure (marker, data) 
     (function(marker, data) { 

      // Attaching a click event to the current marker 
      google.maps.event.addListener(marker, "click", function(e) { 
       infoWindow.setContent(data.description); 
       infoWindow.open(map, marker); 
      }); 


     })(marker, data); 

    }// END for loop 

    // Cluster the markers 
    var markerCluster = new MarkerClusterer(map, markers, mcOptions); 

}// END window.onload 

})();

感谢

来源

2012-11-27 zizther

[这里是迈克·威廉姆斯的经典类图]（http://www.geocodezip.com/v3_MW_example_categories.html ）从他的v2教程（翻译成v3）。解决您正在处理的问题。 – geocodezip

@geocodezip非常感谢。很好的发现。 – zizther

@zizther 显示要分类与MarkerClusterer标记，不是吗？如果是这样，你可以试试这个代码：

<!DOCTYPE html> 
<html> 
    <head> 
    <style> 
     html, body, #map { 
     width: 100%; 
     height: 100%; 
     padding : 0; 
     margin : 0; 
     } 
     #category_panel { 
     background-color : white; 
     padding : 1px; 
     font-size : 13px; 
     margin-top : 5px; 
     border : 1px solid #aaa; 
     } 
    </style> 
    <script src="http://code.jquery.com/jquery-1.8.3.min.js"></script> 
    <script type="text/javascript" 
    src="http://maps.google.com/maps/api/js?sensor=false"></script> 
    <script src="http://google-maps-utility-library-v3.googlecode.com/svn/trunk/markerclusterer/src/markerclusterer.js"></script> 
    <script type="text/javascript"> 
     (function() { 

     var clusterer; 

     window.onload = function() { 

      // Creating a new map 
      var map = new google.maps.Map(document.getElementById("map"), { 
      center : new google.maps.LatLng(30.033591, -36.035156), 
      zoom : 3, 
      mapTypeId : google.maps.MapTypeId.ROADMAP, 
      noClear : true 
      }); 

      var selectDiv = $("#category_panel")[0]; 
      map.controls[google.maps.ControlPosition.TOP_LEFT].push(selectDiv); 

      // Creating the JSON data 
      var json = [{ 
      "title" : "USA", 
      "lat" : 37.616552, 
      "lng" : -92.988281, 
      "description" : "<strong>USA</strong> ...", 
      "category" : "one" 
      }, { 
      "title" : "France", 
      "lat" : 48.372793, 
      "lng" : 1.230469, 
      "description" : "<strong>France</strong> ...", 
      "category" : "two" 
      }, { 
      "title" : "UK", 
      "lat" : 51.517403, 
      "lng" : -0.098877, 
      "description" : "<strong>UK</strong> ...", 
      "category" : "three" 
      }]; 


      /******* 
      * for test (start) 
      ********/ 

      var sw = new google.maps.LatLng(37.616552, -92.988281); 
      var ne = new google.maps.LatLng(51.517403, -0.098877); 
      var bounds = new google.maps.LatLngBounds(sw, ne); 
      map.fitBounds(bounds); 
      var lat,lng,category; 
      var categories = ["one", "two", "three"]; 
      for(var i = 0; i < 300; i++) { 
      lat = Math.random() * (ne.lat() - sw.lat()) + sw.lat(); 
      lng = Math.random() * (ne.lng() - sw.lng()) + sw.lng(); 
      category = categories[Math.floor(Math.random() * 3)]; 
      json.push({ 
       "title" : "random #" + i, 
       "lat" : lat, 
       "lng" : lng, 
       "description" : "<strong>" + category + "</strong><br>random #" + i, 
       "category" : category 
      }); 
      } 
      /******* 
      * for test (end) 
      ********/ 


      // Custom marker - Need one for each category 
      var image = new google.maps.MarkerImage(
      'http://i.imgur.com/3YJ8z.png', 
      new google.maps.Size(19, 25), // size of the image 
      new google.maps.Point(0, 0) // origin, in this case top-left corner 
     ); 

      // Creating a global infoWindow object that will be reused by all markers 
      var infoWindow = new google.maps.InfoWindow(); 

      // Marker Clusterer setup 
      var mcOptions = { 
      gridSize : 50, 
      maxZoom : 15 
      }; 
      clusterer = new MarkerClusterer(map, [], mcOptions); 

      var markers = {}; 
      var categoryIcons = { 
      "one" : "https://chart.googleapis.com/chart?chst=d_map_pin_letter&chld=1%7CFF0000%7C000000", 
      "two" : "https://chart.googleapis.com/chart?chst=d_map_pin_letter&chld=2%7C00FFFF%7C000000", 
      "three" : "https://chart.googleapis.com/chart?chst=d_map_pin_letter&chld=3%7CFF00FF%7C000000" 
      } 

      // Looping through the JSON data 
      for (var i = 0, length = json.length; i < length; i++) { 
      var data = json[i], 
       latLng = new google.maps.LatLng(data.lat, data.lng), 
       category = data.category; 

      if (category in markers == false) { 
       markers[category] = []; 
      } 

      // Creating a marker and putting it on the map 
      var marker = new google.maps.Marker({ 
       position : latLng, 
       title : data.title, 
       icon : categoryIcons[data.category] 
      }); 
      markers[category].push(marker); 

      // Creating a closure to retain the correct data, notice how I pass the current data in the loop into the closure (marker, data) 
      (function(marker, data) { 

       // Attaching a click event to the current marker 
       google.maps.event.addListener(marker, "click", function(e) { 
       infoWindow.setContent(data.description); 
       infoWindow.open(map, marker); 
       }); 
      })(marker, data); 

      }// END for loop 

      $("#category").change(function(){ 
      var selected = $(this).val(); 
      clusterer.clearMarkers(); 
      clusterer.addMarkers(markers[selected]); 
      }); 
      $("#category").change(); 
     }// END window.onload 
     })(); 
    </script> 
    </head> 
    <body> 
    <div id="map"> 
     <div id="category_panel"> 
     category:<select id="category"> 
      <option value="one">one</option> 
      <option value="two">two</option> 
      <option value="three">three</option> 
     </select> 
     </div> 
    </div> 
    </body> 
</html>

enter image description here

来源

2012-11-27 19:05:42 wf9a5m75

非常感谢@ wf9a5m75！那是我以后的事。 – zizther

如果我想在同一时间加载所有标记，但有复选框添加和删除标记，这将如何工作？我知道你可以隐藏和显示标记，但我想markerclusterer并没有注册它们显示或不显示，因为它们实际上并未被删除。 – zizther

谷歌地图 - 每个类别的不同标记图标

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