mirror of https://gitee.com/antv-l7/antv-l7
74 lines
1.4 KiB
Markdown
74 lines
1.4 KiB
Markdown
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---
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title: Cluster Map
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order: 5
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---
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## 使用
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目前只有点数据支持聚类方法
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数据聚合主要从数据层数据，因此需要在Source方法配置 cluster 参数
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### Source
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[source 文档](../../source/source)
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### 配置项
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- cluster **boolean** 是否聚合
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- clusterOption 聚合配置项
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- radius 聚合半径 **number** default 40
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- minZoom: 最小聚合缩放等级 **number** default 0
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- maxZoom: 最大聚合缩放等级 **number** default 16
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数据聚合之后，源数据会增加 point_count属性，在可视化渲染时可以根据 point_count 进行数据映射。
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#### 方法
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**getClusters(zoom: number)**
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获取指定缩放等级的聚合数据
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- zoom 缩放等级
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**getClustersLeaves(id: string)**
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根据id获取聚合节点的数据
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- id 聚合数据id
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```javascript
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layer.source(pointsData, {
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cluster: true,
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});
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// 设置配置项
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layer.source(pointsData, {
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cluster: true,
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clusterOption:{
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radius:40,
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}
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});
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```
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### 完整示例
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```javascript
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const pointLayer = new PointLayer({})
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.source(pointsData, {
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cluster: true,
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})
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.shape('circle')
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.scale('point_count', {
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type: 'quantile',
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})
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.size('point_count', [5, 10, 15, 20, 25])
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.color('red')
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.style({
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opacity: 0.3,
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strokeWidth: 1,
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});
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```
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