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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Geospatially Accurate Circle - Azure Maps Web SDK Samples</title> | |
| <meta charset="utf-8" /> | |
| <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 the extended GeoJSON schema defined by Azure Maps to create a geospatially accurate circle on the map with a filled area and a styled outline." /> | |
| <meta name="keywords" content="map, gis, API, SDK, circles, geospatial, geospatial circles" /> | |
| <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() { | |
| //Initialize a map instance. | |
| map = new atlas.Map('myMap', { | |
| center: [-122.33, 47.6], | |
| zoom: 13, | |
| view: 'Auto', | |
| //Add your Azure Maps subscription key to the map SDK. Get an Azure Maps key at https://azure.com/maps | |
| authOptions: { | |
| 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); | |
| //Create a circle from a Point feature by providing it a subType property set to "Circle" and radius property. | |
| datasource.add(new atlas.data.Feature(new atlas.data.Point([-122.33, 47.6]), { | |
| subType: "Circle", | |
| radius: 1000 | |
| })); | |
| //Create a polygon layer to render the filled in area of the circle polygon, and add it to the map. | |
| map.layers.add(new atlas.layer.PolygonLayer(datasource, null, { | |
| fillColor: 'rgba(0, 200, 200, 0.5)' | |
| })); | |
| }); | |
| } | |
| </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>Geospatially Accurate Circle</legend> | |
| This sample shows how to use the extended GeoJSON schema defined by Azure Maps to create a geospatially accurate circle on the map with a filled area and a styled outline. | |
| As you zoom the map in and out you will notice that circles scales such that it covers the same geospatial area of the map. | |
| </fieldset> | |
| </body> | |
| </html> |