首页 > 其他分享> > Leaflet中使用markerCluster实现点聚合效果

Leaflet中使用markerCluster实现点聚合效果

2022-01-05 20:05:24 作者：互联网

场景

Leaflet中添加标记、折线、圆圈、多边形、弹窗显示点击处坐标：

https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/122309679

在上面实现地图上添加marker标记的功能之后，如果点位特别多，怎样实现聚合效果。

官方提供了插件

官方插件github地址：

https://github.com/Leaflet/Leaflet.markercluster

示例地址：

https://leaflet.github.io/Leaflet.markercluster/example/marker-clustering-realworld.388.html

按照其官方示例代码的源代码，本地复现。

注：

博客：
https://blog.csdn.net/badao_liumang_qizhi
关注公众号
霸道的程序猿
获取编程相关电子书、教程推送与免费下载。

实现

1、新建css样式文件,这是官方示例代码中所使用的聚合样式文件

MarkerCluster.css

.leaflet-cluster-anim .leaflet-marker-icon, .leaflet-cluster-anim .leaflet-marker-shadow {
 -webkit-transition: -webkit-transform 0.3s ease-out, opacity 0.3s ease-in;
 -moz-transition: -moz-transform 0.3s ease-out, opacity 0.3s ease-in;
 -o-transition: -o-transform 0.3s ease-out, opacity 0.3s ease-in;
 transition: transform 0.3s ease-out, opacity 0.3s ease-in;
}

.leaflet-cluster-spider-leg {
 /* stroke-dashoffset (duration and function) should match with leaflet-marker-icon transform in order to track it exactly */
 -webkit-transition: -webkit-stroke-dashoffset 0.3s ease-out, -webkit-stroke-opacity 0.3s ease-in;
 -moz-transition: -moz-stroke-dashoffset 0.3s ease-out, -moz-stroke-opacity 0.3s ease-in;
 -o-transition: -o-stroke-dashoffset 0.3s ease-out, -o-stroke-opacity 0.3s ease-in;
 transition: stroke-dashoffset 0.3s ease-out, stroke-opacity 0.3s ease-in;
}

MarkerCluster.Default.css

.marker-cluster-small {
 background-color: rgba(181, 226, 140, 0.6);
 }
.marker-cluster-small div {
 background-color: rgba(110, 204, 57, 0.6);
 }

.marker-cluster-medium {
 background-color: rgba(241, 211, 87, 0.6);
 }
.marker-cluster-medium div {
 background-color: rgba(240, 194, 12, 0.6);
 }

.marker-cluster-large {
 background-color: rgba(253, 156, 115, 0.6);
 }
.marker-cluster-large div {
 background-color: rgba(241, 128, 23, 0.6);
 }

 /* IE 6-8 fallback colors */
.leaflet-oldie .marker-cluster-small {
 background-color: rgb(181, 226, 140);
 }
.leaflet-oldie .marker-cluster-small div {
 background-color: rgb(110, 204, 57);
 }

.leaflet-oldie .marker-cluster-medium {
 background-color: rgb(241, 211, 87);
 }
.leaflet-oldie .marker-cluster-medium div {
 background-color: rgb(240, 194, 12);
 }

.leaflet-oldie .marker-cluster-large {
 background-color: rgb(253, 156, 115);
 }
.leaflet-oldie .marker-cluster-large div {
 background-color: rgb(241, 128, 23);
}

.marker-cluster {
 background-clip: padding-box;
 border-radius: 20px;
 }
.marker-cluster div {
 width: 30px;
 height: 30px;
 margin-left: 5px;
 margin-top: 5px;

 text-align: center;
 border-radius: 15px;
 font: 12px "Helvetica Neue", Arial, Helvetica, sans-serif;
 }
.marker-cluster span {
 line-height: 30px;
 }

2、新建js文件leaflet.markercluster-src.js，这是实现聚合效果的核心js文件

代码较多，可以直接从github或者示例代码中下载

3、新建marker点位数据源的js文件，realworld.388.js

数据量较大，同上直接下载

4、修改js与css路径后实例化markerCluster

        //实例化markerCluster
        var markers = L.markerClusterGroup();

5、循环将marker数据源中的点marker添加进markerClusterGroup中

        //循环将点marker添加进markerCluserGroup
        for (var i = 0; i < addressPoints.length; i++) {
            var a = addressPoints[i];
            var title = a[2];
            //LatLng表示具有特定纬度和经度的地理点
            var marker = L.marker(new L.LatLng(a[0], a[1]), {
                title: title
            });
            //绑定点击弹窗事件
            marker.bindPopup(title);
            //将点marker添加进markerCluserGroup
            markers.addLayer(marker);
        }

6、将markerClusterGroup添加到地图上

        //将markerClusterGroup添加到地图上
        map.addLayer(markers);

7、完整示例代码

<!doctype html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>leaflet使用markercluster实现聚合</title>
    <link rel="stylesheet" href="https://unpkg.com/leaflet@1.7.1/dist/leaflet.css" />
    <style>
        html,
        body,
        #map {
            padding: 0;
            margin: 0;
            width: 100%;
            height: 100%;
            overflow: hidden;
        }
    </style>
     <link rel="stylesheet" href=".css/MarkerCluster.css" />
        <link rel="stylesheet" href="./css/MarkerCluster.Default.css" />

</head>

<body>
    <div id="map"></div>
    <script type="text/javascript" src="https://unpkg.com/leaflet@1.7.1/dist/leaflet.js"></script>
    <script src="./js/leaflet.markercluster-src.js"></script>
    <script src="./js/realworld.388.js"></script>
    <script type="text/javascript">
        var map = L.map('map').setView([36.09, 120.35], 13);
        L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
            attribution: ''
        }).addTo(map);

        //实例化markerCluster
        var markers = L.markerClusterGroup();
        //循环将点marker添加进markerCluserGroup
        for (var i = 0; i < addressPoints.length; i++) {
            var a = addressPoints[i];
            var title = a[2];
            //LatLng表示具有特定纬度和经度的地理点
            var marker = L.marker(new L.LatLng(a[0], a[1]), {
                title: title
            });
            //绑定点击弹窗事件
            marker.bindPopup(title);
            //将点marker添加进markerCluserGroup
            markers.addLayer(marker);
        }
        //将markerClusterGroup添加到地图上
        map.addLayer(markers);
    </script>
</body>

</html>

8、效果

标签：leaflet,聚合,ease,Leaflet,cluster,background,marker,markerCluster,0.3
来源： https://www.cnblogs.com/badaoliumangqizhi/p/15768616.html