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<!DOCTYPE html> | |
<html lang="en"> | |
<head> | |
<title>Data-driven symbol icons - Azure Maps Web SDK Samples</title> | |
<meta charset="utf-8" /> | |
<link rel="shortcut icon" href="/favicon.ico"/> | |
<meta http-equiv="x-ua-compatible" content="IE=Edge" /> | |
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" /> | |
<meta name="description" content="This sample shows how to use multiple custom icons in a single symbol layer by using data-driven styling with an expression." /> | |
<meta name="keywords" content="Microsoft maps, map, gis, API, SDK, markers, pins, pushpins, symbols, layer, icon, image, expression" /> | |
<meta name="author" content="Microsoft Azure Maps" /> | |
<!-- Add references to the Azure Maps Map control JavaScript and CSS files. --> | |
<link rel="stylesheet" href="https://atlas.microsoft.com/sdk/javascript/mapcontrol/2/atlas.min.css" type="text/css" /> | |
<script src="https://atlas.microsoft.com/sdk/javascript/mapcontrol/2/atlas.min.js"></script> | |
<script type='text/javascript'> | |
var map, datasource; | |
function GetMap() { | |
//Point the Azure Maps domain to the US Azure Gov Cloud domain. | |
atlas.setDomain('atlas.azure.us'); | |
//Initialize a map instance. | |
map = new atlas.Map('myMap', { | |
center: [-73.985708, 40.75773], | |
zoom: 9, | |
view: 'Auto', | |
//Add authentication details for connecting to Azure Maps. | |
authOptions: { | |
//Use Azure Active Directory authentication. | |
authType: 'anonymous', | |
clientId: 'c9f2f391-13f1-407b-a4a5-f0a241bacfbf', //Your Azure Active Directory client id for accessing your Azure Maps account. | |
getToken: function (resolve, reject, map) { | |
//URL to your authentication service that retrieves an Azure Active Directory Token. | |
var tokenServiceUrl = 'https://azuremapscodesamples.azurewebsites.us/Common/TokenService.ashx'; | |
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 () { | |
//Create a data source and add it to the map. | |
datasource = new atlas.source.DataSource(); | |
map.sources.add(datasource); | |
//Load some point data into the data source. | |
datasource.importDataFromUrl('../../Common/data/geojson/SamplePoiDataSet.json'); | |
//Create an array of custom icon promises to load into the map. | |
var iconPromises = [ | |
map.imageSprite.add('gas_station_icon', '../Common/images/icons/gas_station_pin.png'), | |
map.imageSprite.add('grocery_store_icon', '../Common/images/icons/grocery_cart_pin.png'), | |
map.imageSprite.add('restaurant_icon', '../Common/images/icons/restaurant_pin.png'), | |
map.imageSprite.add('school_icon', '../Common/images/icons/school_pin.png'), | |
]; | |
//Load all the custom image icons into the map resources. | |
Promise.all(iconPromises).then(function () { | |
//Add a layer for rendering point data as symbols. | |
map.layers.add(new atlas.layer.SymbolLayer(datasource, null, { | |
iconOptions: { | |
//Use a match expression to select the image icon based on the EntityType property of the data point. | |
image: [ | |
'match', | |
['get', 'EntityType'], | |
//For each entity type, specify the icon name to use. | |
'Gas Station', 'gas_station_icon', | |
'Grocery Store', 'grocery_store_icon', | |
'Restaurant', 'restaurant_icon', | |
'School', 'school_icon', | |
//Default fallback icon. | |
'marker-blue' | |
] | |
} | |
})); | |
}); | |
}); | |
} | |
</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><h1 style="font-size:16px">Data-driven symbol icons</h1></legend> | |
This sample shows how to use multiple custom icons in a single symbol layer by using data-driven styling with an expression. | |
This sample uses a GeoJSON file that contains points of interest as a data source. | |
Each record in this data set has an EntityType property which is one of the following properties: | |
'Gas Station', 'Grocery Store', 'Restaurant', 'School'. | |
This sample uses the EntityType property to select the icon to display on the map. | |
</fieldset> | |
</body> | |
</html> |