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<!DOCTYPE html>
<html>
<head>
<title>Large GeoJSON Files - 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 demonstrates loading large GeoJSON files into the Azure Maps web control." />
<meta name="keywords" content="map, gis, API, SDK, animate, animation, symbol, pushpin, marker, pin" />
<meta name="author" content="Microsoft Azure Maps" />
<!-- Add references to the Atlas 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, infopane, completed = 0, featureCnt = 0, totalFileSize = 0;
var geoJsonData = [
{ name: 'Parcel Boundaries', url: '../Common/data/geojson/parcels.json', fileSizeMB: 80 },
{ name: 'Streets', url: '../Common/data/geojson/streets.json', fileSizeMB: 16 },
{ name: 'Addresses', url: '../Common/data/geojson/address.json', fileSizeMB: 40 }
];
function GetMap() {
//Initialize a map instance.
map = new atlas.Map('myMap', {
center: [-105.076, 40.55],
zoom: 11,
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>'
}
});
infopane = document.getElementById('infopane');
//Wait until the map resources are ready.
map.events.add('ready', function () {
//Create a data source to store the data in.
datasource = new atlas.source.DataSource();
map.sources.add(datasource);
//Add a layer for rendering the outline of polygons.
var polygonLayer = new atlas.layer.LineLayer(datasource, null, {
strokeColor: 'black',
filter: ['any', ['==', ['geometry-type'], 'Polygon'], ['==', ['geometry-type'], 'MultiPolygon']] //Only render Polygon or MultiPolygon in this layer.
});
//Add a click event to the layer.
map.events.add('click', polygonLayer, featureClicked);
//Add a layer for rendering line data.
var lineLayer = new atlas.layer.LineLayer(datasource, null, {
strokeColor: 'purple',
strokeWidth: 4,
filter: ['any', ['==', ['geometry-type'], 'LineString'], ['==', ['geometry-type'], 'MultiLineString']] //Only render LineString or MultiLineString in this layer.
});
//Add a click event to the layer.
map.events.add('click', lineLayer, featureClicked);
//Add a layer for rendering point data.
var pointLayer = new atlas.layer.SymbolLayer(datasource, null, {
iconOptions: {
allowOverlap: true,
ignorePlacement: true,
image: 'pin-round-darkblue'
},
filter: ['any', ['==', ['geometry-type'], 'Point'], ['==', ['geometry-type'], 'MultiPoint']] //Only render Point or MultiPoints in this layer.
});
//Add a click event to the layer.
map.events.add('click', pointLayer, featureClicked);
//Add all layers to the map.
map.layers.add([polygonLayer, lineLayer, pointLayer]);
//Load the GeoJSON feeds.
loadGeoJsonFile(geoJsonData[0]);
loadGeoJsonFile(geoJsonData[1]);
loadGeoJsonFile(geoJsonData[2]);
});
}
function loadGeoJsonFile(geoJsonFeed) {
infopane.innerHTML += 'Downloading ' + geoJsonFeed.name + '...</br/>';
//Download the GeoJSON feed.
//Load the earthquake data.
datasource.importDataFromUrl(geoJsonFeed.url).then(function () {
infopane.innerHTML += 'Retrieved ' + features.length.toLocaleString() + ' ' + features[0].geometry.type + 's (' + geoJsonFeed.fileSizeMB + 'MB)<br/>';
featureCnt += features.length;
totalFileSize += geoJsonFeed.fileSizeMB;
completed++;
if (completed === geoJsonData.length) {
infopane.innerHTML += 'Rendering ' + featureCnt.toLocaleString() + ' features (' + totalFileSize + 'MB)...';
}
});
}
function featureClicked(e) {
//Make sure the event occurred on a shape feature.
if (e.shapes && e.shapes.length > 0) {
//By default, show the popup where the mouse event occurred.
var pos = e.position;
var offset = [0, 0];
var properties;
if (e.shapes[0] instanceof atlas.Shape) {
properties = e.shapes[0].getProperties();
//If the shape is a point feature, show the popup at the points coordinate.
if (e.shapes[0].getType() === 'Point') {
pos = e.shapes[0].getCoordinates();
offset = [0, -18];
}
} else {
properties = e.shapes[0].properties;
//If the shape is a point feature, show the popup at the points coordinate.
if (e.shapes[0].type === 'Point') {
pos = e.shapes[0].geometry.coordinates;
offset = [0, -18];
}
}
//Update the content and position of the popup.
popup.setOptions({
//Create a table from the properties in the feature.
content: '<div style="padding:10px;max-height:200px;overflow-y:auto;">' + object2Table(properties) + '</div>',
position: pos,
pixelOffset: offset
});
//Open the popup.
popup.open(map);
}
}
function object2Table(obj) {
//Create a HTML table from an objects property names and values.
var html = ['<table><tr><td><b>Property</b></td><td><b>Value</b></td><tr>'];
Object.keys(obj).forEach(function (key, index) {
//Ignore private properties which are commonly denoted using an underscore.
if (key.indexOf('_') !== 0) {
html.push('<tr><td>', key, '</td><td>');
if (typeof obj[key] === 'object') {
//If the value of the property is an object, create a sub-table recursively.
html.push(object2Table(obj[key]));
} else {
html.push(obj[key]);
}
html.push('</td><tr>');
}
});
html.push('</table>');
return html.join('');
}
</script>
<style>
#myMap {
position: relative;
width: calc(100% - 210px);
min-width:290px;
height: 600px;
float: left;
}
#infopane {
margin-left: 10px;
width: 200px;
height: 600px;
overflow-y: auto;
float: left;
}
table {
border-collapse: collapse;
}
table, th, td {
border: 1px solid black;
}
</style>
</head>
<body onload="GetMap()">
<div id="myMap"></div>
<div id="infopane"></div>
<div style="clear:both;"></div>
<fieldset style="width:calc(100% - 30px);min-width:290px;margin-top:10px;">
<legend>Large GeoJSON Files</legend>
This sample loads three large GeoJSON files which contain address (point), parcel boundary (polygon), and street (lines) data for all of Fort Collins, CO.<br/><br/>
This sample loads a lot of data and will be slow to load.
</fieldset>
</body>
</html>
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