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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta
name="viewport"
content="initial-scale=1,maximum-scale=1,user-scalable=no"
/>
<title>Point clustering - basic configuration | Sample | GeoScene API for JavaScript 4.22</title>
<style>
html,
body,
#viewDiv {
padding: 0;
margin: 0;
height: 100%;
width: 100%;
background: rgba(50,50,50);
}
#infoDiv {
padding: 10px;
}
</style>
<link rel="stylesheet" href="https://js.geoscene.cn/4.23/geoscene/themes/dark/main.css" />
<script src="https://js.geoscene.cn/4.23/"></script>
<script>
require([
"geoscene/Map",
"geoscene/layers/FeatureLayer",
"geoscene/layers/GeoJSONLayer",
"geoscene/views/MapView",
"geoscene/widgets/Legend",
"geoscene/widgets/Expand",
"geoscene/widgets/Home"
], (Map, FeatureLayer, GeoJSONLayer, MapView, Legend, Expand, Home) => {
// Configures clustering on the layer. A cluster radius
// of 100px indicates an area comprising screen space 100px
// in length from the center of the cluster
const clusterConfig = {
type: "cluster",
clusterRadius: "100px",
// {cluster_count} is an aggregate field containing
// the number of features comprised by the cluster
popupTemplate: {
title: "Cluster summary",
content: "This cluster represents {cluster_count} earthquakes.",
fieldInfos: [{
fieldName: "cluster_count",
format: {
places: 0,
digitSeparator: true
}
}]
},
clusterMinSize: "24px",
clusterMaxSize: "60px",
labelingInfo: [{
deconflictionStrategy: "none",
labelExpressionInfo: {
expression: "Text($feature.cluster_count, '#,###')"
},
symbol: {
type: "text",
color: "#004a5d",
font: {
weight: "bold",
family: "Noto Sans",
size: "12px"
}
},
labelPlacement: "center-center",
}]
};
const layer = new GeoJSONLayer({
title: "Earthquakes from the last month",
url: "https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_month.geojson",
copyright: "USGS Earthquakes",
featureReduction: clusterConfig,
// popupTemplates can still be viewed on
// individual features
popupTemplate: {
title: "Magnitude {mag} {type}",
content: "Magnitude {mag} {type} hit {place} on {time}",
fieldInfos: [
{
fieldName: "time",
format: {
dateFormat: "short-date-short-time"
}
}
]
},
renderer: {
type: "simple",
field: "mag",
symbol: {
type: "simple-marker",
size: 4,
color: "#69dcff",
outline: {
color: "rgba(0, 139, 174, 0.5)",
width: 5
}
}
}
});
// background layer for geographic context
// projected to Alaska Polar Stereographic
const baseLayer = new FeatureLayer({
portalItem: {
id: "2b93b06dc0dc4e809d3c8db5cb96ba69"
},
legendEnabled: false,
popupEnabled: false,
renderer: {
type: "simple",
symbol: {
type: "simple-fill",
color: [65, 65, 65, 1],
outline: {
color: [50, 50, 50, 0.75],
width: 0.5
}
}
},
spatialReference: {
wkid: 5936
}
});
const map = new Map({
layers: [baseLayer, layer]
});
const view = new MapView({
container: "viewDiv",
extent: {
spatialReference: {
wkid: 5936
},
xmin: 1270382,
ymin: -1729511,
xmax: 2461436,
ymax: -953893
},
spatialReference: {
// WGS_1984_EPSG_Alaska_Polar_Stereographic
wkid: 5936
},
constraints: {
minScale: 15469455
},
map: map
});
view.ui.add(new Home({
view: view
}), "top-left");
const legend = new Legend({
view: view,
container: "legendDiv"
});
const infoDiv = document.getElementById("infoDiv");
view.ui.add(new Expand({
view: view,
content: infoDiv,
expandIconClass: "esri-icon-layer-list",
expanded: false
}), "top-left");
const toggleButton = document.getElementById("cluster");
// To turn off clustering on a layer, set the
// featureReduction property to null
toggleButton.addEventListener("click", () => {
let fr = layer.featureReduction;
layer.featureReduction = fr && fr.type === "cluster" ? null : clusterConfig;
toggleButton.innerText = toggleButton.innerText === "Enable Clustering" ? "Disable Clustering" : "Enable Clustering";
});
});
</script>
</head>
<body>
<div id="viewDiv"></div>
<div id="infoDiv" class="geoscene-widget">
<button id="cluster" class="geoscene-button">Disable Clustering</button>
<div id="legendDiv"></div>
</div>
</body>
</html>
