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Polygon labels - symbol layer.html
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Polygon labels - symbol layer.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>Polygon labels - symbol layer - Azure Maps Web SDK Samples</title>
<meta charset="utf-8" />
<link rel="shortcut icon" href="/favicon.ico"/>
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" />
<meta name="description" content="This sample shows how the symbol layer can be used to automatically render labels for polygons on the map. " />
<meta name="keywords" content="Microsoft maps, map, gis, API, SDK, template, fill pattern, polygonlayer" />
<meta name="author" content="Microsoft Azure Maps" /><meta name="version" content="1.0" />
<meta name="screenshot" content="screenshot.jpg" />
<!-- Add references to the Azure Maps Map control JavaScript and CSS files. -->
<link href="https://atlas.microsoft.com/sdk/javascript/mapcontrol/3/atlas.min.css" rel="stylesheet" />
<script src="https://atlas.microsoft.com/sdk/javascript/mapcontrol/3/atlas.min.js"></script>
<script>
var map;
var data = [
{
"type": "Feature",
"properties": {
"label": "Polygon 1"
},
"geometry": {
"type": "Polygon",
"coordinates": [[[-102.54364, 42.50045], [-102.14263, 42.49235], [-102.27722, 42.66830], [-102.54364, 42.50045]]
]
}
},
{
"type": "Feature",
"properties": {
"label": "Polygon 2"
},
"geometry": {
"type": "Polygon",
"coordinates": [[[-100.89294, 42.73490], [-100.91766, 42.46601], [-100.40954, 42.47412], [-100.39581, 42.56521], [-100.72814, 42.57533], [-100.71990, 42.73692], [-100.89294, 42.73490]]
]
}
},
{
"type": "Feature",
"properties": {
"label": "Polygon 3"
},
"geometry": {
"type": "Polygon",
"coordinates": [[[-101.00555, 41.72828], [-100.92041, 41.61954], [-100.24749, 41.96561], [-100.39306, 42.10637], [-101.00555, 41.72828]]
]
}
},
{
"type": "Feature",
"properties": {
"label": "Polygon 4"
},
"geometry": {
"type": "Polygon",
"coordinates": [[[-102.69744, 41.70777], [-102.10144, 41.70777], [-102.10144, 41.95540], [-102.69744, 41.95540], [-102.69744, 41.70777]]
]
}
}
];
function getMap() {
//Initialize a map instance.
map = new atlas.Map('myMap', {
center: [-101.4285, 42.1695],
zoom: 8,
view: 'Auto',
//Add authentication details for connecting to Azure Maps.
authOptions: {
//Use Microsoft Entra ID authentication.
authType: 'anonymous',
clientId: 'e6b6ab59-eb5d-4d25-aa57-581135b927f0', //Your Azure Maps client id for accessing your Azure Maps account.
getToken: function (resolve, reject, map) {
//URL to your authentication service that retrieves an Microsoft Entra ID Token.
var tokenServiceUrl = 'https://samples.azuremaps.com/api/GetAzureMapsToken';
fetch(tokenServiceUrl).then(r => r.text()).then(token => resolve(token));
}
//Alternatively, use an Azure Maps key. Get an Azure Maps key at https://azure.com/maps. NOTE: The primary key should be used as the key.
//authType: 'subscriptionKey',
//subscriptionKey: '[YOUR_AZURE_MAPS_KEY]'
}
});
//Wait until the map resources are ready.
map.events.add('ready', function () {
datasource = new atlas.source.DataSource();
map.sources.add(datasource);
//Add the polygon data to the data source.
datasource.add(data);
map.layers.add([
//Create a layer to render the polygon data.
new atlas.layer.PolygonLayer(datasource),
//Create a layer to render the label of the polygon.
new atlas.layer.SymbolLayer(datasource, null, {
iconOptions: {
//Hide the default image.
image: 'none'
},
textOptions: {
//Reference the label property of the polygon as the text field.
textField: ['get', 'label']
}
})
]);
});
}
</script>
</head>
<body onload="getMap()">
<div id="myMap" style="position:relative;width:100%;min-width:290px;height:600px;"></div>
<fieldset style="width:calc(100% - 30px);min-width:290px;margin-top:10px;">
<legend>Polygon labels - symbol layer</legend>
This sample shows how the symbol layer can be used to automatically render labels for polygons on the map.
</fieldset>
</body>
</html>