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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>GeoScene Developer Guide: Population density by race and ethnicity</title>
<link rel="stylesheet" href="https://js.geoscene.cn/4.23/geoscene/themes/dark/main.css" />
<style>
html,
body,
#viewDiv {
padding: 0;
margin: 0;
height: 100%;
width: 100%;
}
</style>
<script src="https://js.geoscene.cn/4.23/"></script>
<script>
require([
"geoscene/config",
"geoscene/WebMap",
"geoscene/views/MapView",
"geoscene/layers/FeatureLayer",
"geoscene/renderers/DotDensityRenderer",
"geoscene/widgets/Legend",
"geoscene/widgets/Bookmarks",
"geoscene/widgets/Expand"
], function (
geosceneConfig,
WebMap,
MapView,
FeatureLayer,
DotDensityRenderer,
Legend,
Bookmarks,
Expand
) {
geosceneConfig.apiKey = "YOUR_API_KEY";
const map = new WebMap({
portalItem: {
id: "56b5bd522c52409c90d902285732e9f1"
}
});
const view = new MapView({
container: "viewDiv",
map: map,
highlightOptions: {
fillOpacity: 0,
color: [50, 50, 50]
},
popup: {
dockEnabled: true,
dockOptions: {
position: "top-right",
breakpoint: false
}
},
constraints: {
maxScale: 35000,
snapToZoom: false
}
});
view.when().then(function () {
const dotDensityRenderer = new DotDensityRenderer({
dotValue: 100,
outline: null,
referenceScale: 577790, // 1:577,790 view scale
legendOptions: {
unit: "people"
}
});
dotDensityRenderer.attributes = [
{
field: "B03002_003E",
color: "#f23c3f",
label: "White (non-Hispanic)"
},
{
field: "B03002_012E",
color: "#e8ca0d",
label: "Hispanic"
},
{
field: "B03002_004E",
color: "#00b6f1",
label: "Black or African American"
},
{
field: "B03002_006E",
color: "#32ef94",
label: "Asian"
},
{
field: "B03002_005E",
color: "#ff7fe9",
label: "American Indian/Alaskan Native"
},
{
field: "B03002_007E",
color: "#e2c4a5",
label: "Pacific Islander/Hawaiian Native"
},
{
field: "B03002_008E",
color: "#ff6a00",
label: "Other race"
},
{
field: "B03002_009E",
color: "#96f7ef",
label: "Two or more races"
}
];
// Add renderer to the layer and define a popup template
const url = "https://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/ACS_Population_by_Race_and_Hispanic_Origin_Boundaries/FeatureServer/2";
const layer = new FeatureLayer({
url: url,
minScale: 20000000,
maxScale: 35000,
title: "Current Population Estimates (ACS)",
popupTemplate: {
title: "{County}, {State}",
content: [
{
type: "fields",
fieldInfos: [
{
fieldName: "B03002_003E",
label: "White (non-Hispanic)",
format: {
digitSeparator: true,
places: 0
}
},
{
fieldName: "B03002_012E",
label: "Hispanic",
format: {
digitSeparator: true,
places: 0
}
},
{
fieldName: "B03002_004E",
label: "Black or African American",
format: {
digitSeparator: true,
places: 0
}
},
{
fieldName: "B03002_006E",
label: "Asian",
format: {
digitSeparator: true,
places: 0
}
},
{
fieldName: "B03002_005E",
label: "American Indian/Alaskan Native",
format: {
digitSeparator: true,
places: 0
}
},
{
fieldName: "B03002_007E",
label: "Pacific Islander/Hawaiian Native",
format: {
digitSeparator: true,
places: 0
}
},
{
fieldName: "B03002_008E",
label: "Other race",
format: {
digitSeparator: true,
places: 0
}
},
{
fieldName: "B03002_009E",
label: "Two or more races",
format: {
digitSeparator: true,
places: 0
}
}
]
}
]
},
renderer: dotDensityRenderer
});
map.add(layer);
view.ui.add(
[
new Expand({
view: view,
content: new Legend({ view: view }),
group: "top-right",
expanded: true
}),
new Expand({
view: view,
content: new Bookmarks({ view: view }),
group: "top-right"
})
],
"top-right"
);
});
});
</script>
</head>
<body>
<div id="viewDiv"></div>
</body>
</html>
