ArcGIS 点聚合功能实现全教程（进阶版）
本教程聚焦点数据生成、多类别样式配置、聚合开关控制及类别筛选等核心功能的进阶实现逻辑，深入解析点聚合功能进阶用法。
文章目录
- ArcGIS 点聚合功能实现全教程（进阶版）
- 效果图
- 实现功能
- 一、核心功能实现步骤
- （一）点要素图层创建
- （二）点聚合功能配置
- （三）辅助功能实现
- 二、其他
- 三、全部代码
- index.html
- tiandituLoader.js
工具 /插件/系统 名 | 版本 | 说明 |
ArcGIS for JavaScript | 4.33 | 适用4.28 - 4.33版本 |
效果图
效果1 | 效果2 |
|
|
实现功能
- 聚合开关切换：通过 “启用 / 禁用聚合” 按钮控制聚合状态，点击时切换图层featureReduction属性（聚合模式 / 非聚合模式），并同步更新按钮文本，实现交互化聚合控制。
- 类别条件筛选：通过下拉框提供 “全部 + 4 个类别” 的筛选选项，选择后触发图层筛选逻辑，仅显示符合category条件的点要素，同时关闭当前弹窗避免信息干扰，实现精准数据筛选。
- 聚合样式：不同类别的聚合簇采用对应的图标。
一、核心功能实现步骤
（一）点要素图层创建
- 定义数据结构：设置字段信息，包含唯一标识、类别与数值字段
fields: [{
name: "ObjectID",
alias: "ObjectID",
type: "oid"
}, {
name: "category",
alias: "类别",
type: "integer"
}, {
name: "value",
alias: "值",
type: "integer"
}]- 生成随机点数据：通过
generateRandomPoints函数创建 5000 个随机点，经度范围 0-119，纬度范围 30-60，随机分配 4 个类别
function generateRandomPoints(count) {
const points = [];
for (let i = 0; i < count; i++) {
const lon = (Math.random() * 119); // 经度范围
const lat = (Math.random() * 30) + 30; // 纬度范围
// 随机分配类别
const category = Math.floor(Math.random() * 4);
points.push({
geometry: {
type: "point",
longitude: lon,
latitude: lat
},
attributes: {
ObjectID: i,
category: category,
value: Math.floor(Math.random() * 100)
}
});
}
return points;
}- 设置要素样式：采用唯一值渲染，为 4 个类别分别设置不同样式，包括简单圆形标记与图片标记
renderer: {
type: "unique-value",
field: "category",
uniqueValueInfos: [
{
value: 0, symbol: {
type: 'simple-marker',
color: [24, 174, 255, 0.5],
size: 16,
style: "circle",
outline: {
color: [24, 174, 255, 0.8],
width: 2
}
},
label: "类别1"
},
// 其他类别样式配置...
]
}- 配置弹窗模板：点击单点时显示类别与数值信息
popupTemplate: {
title: "{category}",
content: "类别：{category}，值：{value}",
}（二）点聚合功能配置
- 生成聚合配置：通过
generateClusterConfig函数创建聚合参数，包含弹窗模板、标签样式、最小聚合尺寸与最大聚合比例尺
async function generateClusterConfig(layer) {
const popupTemplate = await clusterPopupCreator
.getTemplates({ layer })
.then(res => res.primaryTemplate.value);
const { labelingInfo, clusterMinSize } = await clusterLabelCreator
.getLabelSchemes({ layer, view })
.then(res => res.primaryScheme);
return {
type: "cluster",
popupTemplate,
labelingInfo,
clusterMinSize,
maxScale: 50000
};
}- 实现聚合开关：通过
toggleClustering函数切换聚合状态，点击按钮时修改featureReduction属性
function toggleClustering() {
let fr = layer.featureReduction;
layer.featureReduction = fr && fr.type === "cluster" ? null : featureReduction;
toggleButton.innerText = toggleButton.innerText === "启用聚合" ? "禁用聚合" : "启用聚合";
}（三）辅助功能实现
- 图例组件：创建图例并关联地图视图，展示各类别样式说明
const legend = new Legend({
view,
container: "legendDiv",
});- 类别筛选：监听下拉框变化，通过
layerView.filter设置筛选条件，筛选特定类别点数据
filterSelect.addEventListener("change", (event) => {
const newValue = event.target.value;
const whereClause = newValue ? \`category = ${newValue}\` : null;
layerView.filter = { where: whereClause };
view.closePopup();
});- 聚合弹窗样式优化：修改聚合区域边界样式，增强视觉辨识度
reactiveUtils.whenOnce(() => view.popup.viewModel)
.then(() => {
view.popup.viewModel.selectedClusterBoundaryFeature.symbol = {
type: "simple-fill",
style: "solid",
color: "rgba(50,50,50,0.8)",
outline: { width: 0.5, color: "rgba(50,50,50,0.8)" }
};
});二、其他
- 符号类型匹配：确保点要素使用
simple-marker或picture-marker类型，避免因符号类型错误导致渲染失效 - 类别值匹配：筛选下拉框的
value属性需与category字段值一致（0-3），原示例中值为 1-4 需修正为 0-4 - 按钮初始文本：聚合按钮初始文本应设为 “启用聚合”，与切换逻辑匹配
- 要素加载时机：所有依赖图层的操作需在
layer.when()回调中执行，确保图层加载完成
三、全部代码
index.html
<!doctype html>
<html lang="zh-CN">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
<title>ArcGIS 点聚合基础示例</title>
<link rel="stylesheet" href="https://js.arcgis.com/4.33/esri/themes/light/main.css" />
<script src="https://js.arcgis.com/4.33/"></script>
<style>
html,
body,
#viewDiv {
height: 100%;
width: 100%;
margin: 0;
padding: 0;
}
#infoDiv {
background: white;
padding: 10px;
}
</style>
<script type="module">
import { loadTiandituBasemap } from './js/tiandituLoader.js';
const [
Map,
MapView,
FeatureLayer,
Legend,
Expand,
clusterLabelCreator,
clusterPopupCreator,
reactiveUtils,
] = await $arcgis.import([
"@arcgis/core/WebMap.js",
"@arcgis/core/views/MapView.js",
"@arcgis/core/layers/FeatureLayer.js",
"@arcgis/core/widgets/Legend.js",
"@arcgis/core/widgets/Expand.js",
"@arcgis/core/smartMapping/labels/clusters.js",
"@arcgis/core/smartMapping/popup/clusters.js",
"@arcgis/core/core/reactiveUtils.js",
]);
const { tileInfo, config, getUrlTemplate, tiandituBasemap, Basemap, WebTileLayer } = await loadTiandituBasemap();
const layer = new FeatureLayer({
source: generateRandomPoints(5000),
title: "点聚合",
fields: [{
name: "ObjectID",
alias: "ObjectID",
type: "oid"
}, {
name: "category",
alias: "类别",
type: "integer"
}, {
name: "value",
alias: "值",
type: "integer"
}],
outFields: ["*"],
popupTemplate: {
title: "{category}",
content: "类别：{category}，值：{value}",
},
renderer: {
type: "unique-value",
field: "category",
uniqueValueInfos: [
{
value: 0, symbol: {
type: 'simple-marker', // 点要素专用符号类型（核心修复点）
color: [24, 174, 255, 0.5], // 半透明蓝色（与原需求一致）
size: 16, // 点的大小（像素，建议12-20，适配视觉）
style: "circle", // 点的形状（circle/方形/square/三角形/triangle等）
outline: { // 点的描边（增强辨识度）
color: [24, 174, 255, 0.8],
width: 2
}
},
label: "类别1"
},
{
value: 1, symbol: {
type: "picture-marker",
url: "https://picsum.photos/20/20", // 20x20的图片
width: "20px",
height: "20px",
yoffset: "10px" // 图标偏移，使底部对准点位置
}, label: "类别2"
},
{
value: 2, symbol: {
type: 'simple-marker', // 点要素专用符号类型（核心修复点）
color: [24, 14, 255, 0.5], // 半透明蓝色（与原需求一致）
size: 16, // 点的大小（像素，建议12-20，适配视觉）
style: "circle", // 点的形状（circle/方形/square/三角形/triangle等）
outline: { // 点的描边（增强辨识度）
color: [24, 14, 255, 0.8],
width: 2
}
}, label: "类别3"
},
{
value: 3, symbol: {
type: 'simple-marker', // 点要素专用符号类型（核心修复点）
color: [24, 144, 55, 0.5], // 半透明蓝色（与原需求一致）
size: 16, // 点的大小（像素，建议12-20，适配视觉）
style: "circle", // 点的形状（circle/方形/square/三角形/triangle等）
outline: { // 点的描边（增强辨识度）
color: [24, 144, 55, 0.5],
width: 2
}
}, label: "类别4"
}
]
}
});
const map = new Map({
basemap: tiandituBasemap,
layers: [layer],
});
const view = new MapView({
container: "viewDiv",
map,
center: [116.39, 39.9],
zoom: 4,
});
reactiveUtils
.whenOnce(() => view.popup.viewModel)
.then(() => {
// Override the default symbol representing the cluster extent
view.popup.viewModel.selectedClusterBoundaryFeature.symbol = {
type: "simple-fill",
style: "solid",
color: "rgba(50,50,50,0.8)",
outline: {
width: 0.5,
color: "rgba(50,50,50,0.8)",
},
};
});
const legend = new Legend({
view,
container: "legendDiv",
});
const infoDiv = document.getElementById("infoDiv");
view.ui.add(
new Expand({
view,
content: infoDiv,
expandIcon: "list-bullet",
expanded: true,
}),
"top-right",
);
layer
.when()
.then(generateClusterConfig)
.then((featureReduction) => {
layer.featureReduction = featureReduction;
// 核心添加,切换点聚合模式，
const toggleButton = document.getElementById("toggle-cluster");
toggleButton.addEventListener("click", toggleClustering);
// To turn off clustering on a layer, set the
// featureReduction property to null
function toggleClustering() {
let fr = layer.featureReduction;
layer.featureReduction = fr && fr.type === "cluster" ? null : featureReduction;
toggleButton.innerText =
toggleButton.innerText === "启用聚合"
? "禁用聚合"
: "启用聚合";
}
view.whenLayerView(layer).then((layerView) => {
const filterSelect = document.getElementById("filter");
filterSelect.addEventListener("change", (event) => {
const newValue = event.target.value;
const whereClause = newValue ? `category = ${newValue}` : null;
console.log(whereClause)
layerView.filter = {
where: whereClause,
};
view.closePopup();
});
});
})
.catch((error) => {
console.error(error);
});
async function generateClusterConfig(layer) {
// generates default popupTemplate
const popupTemplate = await clusterPopupCreator
.getTemplates({ layer })
.then((popupTemplateResponse) => popupTemplateResponse.primaryTemplate.value);
// generates default labelingInfo
const { labelingInfo, clusterMinSize } = await clusterLabelCreator
.getLabelSchemes({ layer, view })
.then((labelSchemes) => labelSchemes.primaryScheme);
return {
type: "cluster",
popupTemplate,
labelingInfo,
clusterMinSize,
maxScale: 50000
};
}
function generateRandomPoints(count) {
const points = [];
for (let i = 0; i < count; i++) {
const lon = (Math.random() * 119); // 经度范围
const lat = (Math.random() * 30) + 30; // 纬度范围
// 随机分配类别
const category = Math.floor(Math.random() * 4);
points.push({
geometry: {
type: "point",
longitude: lon,
latitude: lat
},
attributes: {
ObjectID: i,
category: category,
value: Math.floor(Math.random() * 100)
}
});
}
return points;
}
</script>
</head>
<body>
<div id="viewDiv"></div>
<div id="infoDiv" class="esri-widget">
类别筛选（category）:
<select id="filter" class="esri-select">
<option value="">全部</option>
<option value="1">类别1</option>
<option value="2">类别2</option>
<option value="3">类别3</option>
<option value="4">类别4</option>
</select>
<div style="padding-top: 10px">
<button id="toggle-cluster" class="esri-button">点聚合</button>
</div>
<div id="legendDiv"></div>
</div>
</body>
</html>tiandituLoader.js
/**
* 天地图加载公共模块
* 功能：封装天地图底图加载逻辑，返回配置好的Basemap实例
* 依赖：ArcGIS API 4.x
*/
export async function loadTiandituBasemap() {
try {
// 1. 按需导入ArcGIS核心模块
const [
WebTileLayer,
Basemap,
TileInfo
] = await $arcgis.import([
"@arcgis/core/layers/WebTileLayer",
"@arcgis/core/Basemap",
"@arcgis/core/layers/support/TileInfo",
]);
// 2. 配置参数（可根据需求调整）
const config = {
tk: "你的密钥", // 天地图密钥
spatialReference: { wkid: 4326 }, // 目标坐标系（WGS84）
subDomains: ["0", "1", "2", "3", "4", "5", "6", "7"], // 多子域名
tileMatrixSet: "c", // 天地图瓦片矩阵集
layerType: {
vec: "vec", // 矢量底图
cva: "cva" // 矢量注记
}
};
// 3. 定义瓦片信息（匹配WGS84坐标系的瓦片规则）
const tileInfo = new TileInfo({
dpi: 90.71428571427429,
rows: 256,
cols: 256,
compressionQuality: 0,
origin: { x: -180, y: 90 },
spatialReference: config.spatialReference,
lods: [
{ level: 2, levelValue: 2, resolution: 0.3515625, scale: 147748796.52937502 },
{ level: 3, levelValue: 3, resolution: 0.17578125, scale: 73874398.264687508 },
{ level: 4, levelValue: 4, resolution: 0.087890625, scale: 36937199.132343754 },
{ level: 5, levelValue: 5, resolution: 0.0439453125, scale: 18468599.566171877 },
{ level: 6, levelValue: 6, resolution: 0.02197265625, scale: 9234299.7830859385 },
{ level: 7, levelValue: 7, resolution: 0.010986328125, scale: 4617149.8915429693 },
{ level: 8, levelValue: 8, resolution: 0.0054931640625, scale: 2308574.9457714846 },
{ level: 9, levelValue: 9, resolution: 0.00274658203125, scale: 1154287.4728857423 },
{ level: 10, levelValue: 10, resolution: 0.001373291015625, scale: 577143.73644287116 },
{ level: 11, levelValue: 11, resolution: 0.0006866455078125, scale: 288571.86822143558 },
{ level: 12, levelValue: 12, resolution: 0.00034332275390625, scale: 144285.93411071779 },
{ level: 13, levelValue: 13, resolution: 0.000171661376953125, scale: 72142.967055358895 },
{ level: 14, levelValue: 14, resolution: 8.58306884765625e-005, scale: 36071.483527679447 },
{ level: 15, levelValue: 15, resolution: 4.291534423828125e-005, scale: 18035.741763839724 },
{ level: 16, levelValue: 16, resolution: 2.1457672119140625e-005, scale: 9017.8708819198619 },
{ level: 17, levelValue: 17, resolution: 1.0728836059570313e-005, scale: 4508.9354409599309 },
{ level: 18, levelValue: 18, resolution: 5.3644180297851563e-006, scale: 2254.4677204799655 },
{ level: 19, levelValue: 19, resolution: 2.68220901489257815e-006, scale: 1127.23386023998275 },
{ level: 20, levelValue: 20, resolution: 1.341104507446289075e-006, scale: 563.616930119991375 }
]
});
// 4. 构建天地图URL模板（支持多子域名）
const getUrlTemplate = (layer) => {
return `http://t0.tianditu.gov.cn/${layer}_${config.tileMatrixSet}/wmts?SERVICE=WMTS&REQUEST=GetTile&VERSION=1.0.0&LAYER=${layer}&STYLE=default&TILEMATRIXSET=${config.tileMatrixSet}&TILEMATRIX={level}&TILEROW={row}&TILECOL={col}&FORMAT=tiles&tk=${config.tk}`;
};
// 5. 创建矢量底图图层
const vecLayer = new WebTileLayer({
urlTemplate: getUrlTemplate(config.layerType.vec),
subDomains: config.subDomains,
copyright: "天地图 © 国家地理信息公共服务平台",
spatialReference: config.spatialReference,
tileInfo: tileInfo
});
// 6. 创建矢量注记图层
const cvaLayer = new WebTileLayer({
urlTemplate: getUrlTemplate(config.layerType.cva),
subDomains: config.subDomains,
copyright: "天地图 © 国家地理信息公共服务平台",
spatialReference: config.spatialReference,
tileInfo: tileInfo
});
// 7. 创建自定义底图并返回
const tiandituBasemap = new Basemap({
baseLayers: [vecLayer],
referenceLayers: [cvaLayer],
title: "天地图矢量图(WGS84)",
id: "tianditu-vector-wgs84"
});
return {
tileInfo,
config,
getUrlTemplate,
tiandituBasemap,
WebTileLayer,
Basemap
};
} catch (error) {
console.error("天地图加载失败：", error);
throw new Error("天地图公共模块加载异常，请检查依赖和配置");
}
}
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