Style clusters

Style clusters and markers with L.DivIcon and L.MarkerClusterGroup options. More information about Feature Layers can be found in the L.esri.FeatureLayer documentation.

Use dark colors for code blocksCopy
                                                                                                                                                                                          
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
<html>
  <head>
    <meta charset="utf-8" />
    <title>Styling clusters</title>
    <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no" />
    <link rel="stylesheet" href="https://unpkg.com/leaflet@1.8.0/dist/leaflet.css" crossorigin="" />
    <script src="https://unpkg.com/leaflet@1.8.0/dist/leaflet.js" crossorigin=""></script>

    <!-- Load Esri Leaflet from CDN -->
    <script src="https://unpkg.com/esri-leaflet@^3.0.8/dist/esri-leaflet.js"></script>
    <!-- Load Esri Leaflet Vector from CDN -->
    <script src="https://unpkg.com/esri-leaflet-vector@3.1.3/dist/esri-leaflet-vector.js" crossorigin=""></script>
    <!-- Load Leaflet MarkerCluster and Esri Leaflet Cluster from CDN -->
    <link rel="stylesheet" type="text/css"
      href="https://unpkg.com/leaflet.markercluster@1.5.0/dist/MarkerCluster.Default.css"
      integrity="sha512-6ZCLMiYwTeli2rVh3XAPxy3YoR5fVxGdH/pz+KMCzRY2M65Emgkw00Yqmhh8qLGeYQ3LbVZGdmOX9KUjSKr0TA=="
      crossorigin="">
    <link rel="stylesheet" type="text/css" href="https://unpkg.com/leaflet.markercluster@1.5.0/dist/MarkerCluster.css"
      integrity="sha512-mQ77VzAakzdpWdgfL/lM1ksNy89uFgibRQANsNneSTMD/bj0Y/8+94XMwYhnbzx8eki2hrbPpDm0vD0CiT2lcg=="
      crossorigin="">
    <script src="https://unpkg.com/leaflet.markercluster@1.5.0/dist/leaflet.markercluster.js"
      integrity="sha512-pWPELjRaw2ZdoT0PDi7iRpRlk1XX3rtnfejJ/HwskyojpHei+9hKpwdphC4yssNt4FM0TjMQOmMrk6ZYSn274w=="
      crossorigin=""></script>
    <script src="https://unpkg.com/esri-leaflet-cluster@2.1.0/dist/esri-leaflet-cluster.js"
      integrity="sha512-fEdNFHisleVtEYdLhW4Z2RsR7TN6hLutE/+O4D+skfTNY2rlHm8HOZARPWkdrFFy/+i2KjFxcZAKTUWaVfbV0g=="
      crossorigin=""></script>
    <style>
      html,
      body,
      #map {
        padding: 0;
        margin: 0;
        height: 100%;
        width: 100%;
        font-family: Arial, Helvetica, sans-serif;
        font-size: 14px;
        color: #323232;
      }
    </style>
  </head>
  <body>
    <style>
      .cluster {
        background: #2d84c8;
        border-radius: 50%;
        text-align: center;
        color: white;
        font-weight: 700;
        border: 1px solid #2d84c8;
        font-family: monospace;
      }

      .cluster:before {
        content: " ";
        position: absolute;
        border-radius: 50%;
        z-index: -1;
        top: 1px;
        left: 1px;
        right: 1px;
        bottom: 1px;
        border: 1px solid white;
      }

      .digits-1 {
        font-size: 14px;
        height: 28px;
        width: 28px;
        line-height: 28px;
        margin-top: -14px;
        margin-left: -14px;
      }

      .digits-2 {
        font-size: 16px;
        height: 34px;
        width: 34px;
        line-height: 35px;
        margin-top: -17px;
        margin-left: -17px;
      }

      .digits-2:before {
        border-width: 2px;
      }

      .digits-3 {
        font-size: 18px;
        height: 48px;
        width: 47px;
        line-height: 47px;
        border-width: 3px;
        margin-top: -24px;
        margin-left: -24px;
      }

      .digits-3:before {
        border-width: 3px;
      }

      .digits-4 {
        font-size: 18px;
        height: 58px;
        width: 58px;
        line-height: 57px;
        border-width: 4px;
        margin-top: -29px;
        margin-left: -29px;
      }

      .digits-4:before {
        border-width: 4px;
      }
    </style>
    <div id="map"></div>
    <script>
      const apiKey = "YOUR_API_KEY";

      const map = L.map("map", {
        maxZoom: 18 // The clustering plugin needs to understand the map's maxZoom
      }).setView([0, 0], 2);

      L.esri.Vector.vectorBasemapLayer("ArcGIS:NavigationNight", {
        apikey: apiKey
      }).addTo(map);

      // create a new cluster layer (new syntax at 2.0.0)
      const earthquakes = L.esri.Cluster.featureLayer({
        url: "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Earthquakes_Since1970/MapServer/0",
        spiderfyOnMaxZoom: false,
        removeOutsideVisibleBounds: true,
        disableClusteringAtZoom: 8,
        // this function defines how the icons
        // representing clusters are created
        iconCreateFunction: function (cluster) {
          // get the number of items in the cluster
          const count = cluster.getChildCount();

          // figure out how many digits long the number is
          const digits = (count + "").length;

          // Return a new L.DivIcon with our classes so we can
          // style them with CSS. Take a look at the CSS in
          // the <head> to see these styles. You have to set
          // iconSize to null if you want to use CSS to set the
          // width and height.
          return L.divIcon({
            html: count,
            className: "cluster digits-" + digits,
            iconSize: null
          });
        },
        // This function defines how individual markers
        // are created. You can see we are using the
        // value of the "magnitude" field to set the symbol
        pointToLayer: function (geojson, latlng) {
          const magnitude = geojson.properties.magnitude;
          let earthquakeSymbol = "";

          if (!magnitude) {
            earthquakeSymbol = "https://esri.github.io/esri-leaflet/img/earthquake-icon.png";
          } else if (magnitude <= 4.999) {
            earthquakeSymbol = "https://esri.github.io/esri-leaflet/img/yellow-triangle.png";
          } else if (magnitude >= 5 && magnitude <= 6.999) {
            earthquakeSymbol = "https://esri.github.io/esri-leaflet/img/orange-triangle.png";
          } else if (magnitude >= 7) {
            earthquakeSymbol = "https://esri.github.io/esri-leaflet/img/red-triangle.png";
          }

          const mapIcon = L.icon({
            iconUrl: earthquakeSymbol,
            iconSize: [20, 20]
          });

          return L.marker(latlng, {
            icon: mapIcon
          });
        }
      }).addTo(map);

      earthquakes.bindPopup(function (layer) {
        return L.Util.template("Magnitude <strong>{magnitude}</strong> earthquake", layer.feature.properties);
      });
    </script>
  </body>
</html>

Your browser is no longer supported. Please upgrade your browser for the best experience. See our browser deprecation post for more details.