itowns
Version:
A JS/WebGL framework for 3D geospatial data visualization
152 lines (134 loc) • 7.28 kB
HTML
<html>
<head>
<title>Itowns - Globe + color layers from vector data</title>
<meta charset="UTF-8">
<link rel="stylesheet" type="text/css" href="css/example.css">
<link rel="stylesheet" type="text/css" href="css/LoadingScreen.css">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script src="https://cdnjs.cloudflare.com/ajax/libs/dat-gui/0.7.6/dat.gui.min.js"></script>
</head>
<body>
<div id="viewerDiv" class="viewer"></div>
<script src="js/GUI/GuiTools.js"></script>
<script src="../dist/itowns.js"></script>
<script src="../dist/debug.js"></script>
<script src="js/GUI/LoadingScreen.js"></script>
<script src="js/plugins/FeatureToolTip.js"></script>
<script type="text/javascript">
// # Simple Globe viewer
/* global itowns, setupLoadingScreen, GuiTools, ToolTip */
// Define initial camera position
var placement = {
coord: new itowns.Coordinates('EPSG:4326', 3.5, 44),
range: 1000000,
}
// `viewerDiv` will contain iTowns' rendering area (`<canvas>`)
var viewerDiv = document.getElementById('viewerDiv');
// Instanciate iTowns GlobeView*
var view = new itowns.GlobeView(viewerDiv, placement);
var menuGlobe = new GuiTools('menuDiv', view);
setupLoadingScreen(viewerDiv, view);
FeatureToolTip.init(viewerDiv, view);
// Add one imagery layer to the scene
// This layer is defined in a json file but it could be defined as a plain js
// object. See Layer* for more info.
itowns.Fetcher.json('./layers/JSONLayers/Ortho.json').then(function _(config) {
config.source = new itowns.WMTSSource(config.source);
var layer = new itowns.ColorLayer('Ortho', config);
view.addLayer(layer).then(function _() {
menuGlobe.addLayerGUI.bind(menuGlobe);
itowns.ColorLayersOrdering.moveLayerToIndex(view, 'Ortho', 0);
});
});
// Add two elevation layers.
// These will deform iTowns globe geometry to represent terrain elevation.
function addElevationLayerFromConfig(config) {
config.source = new itowns.WMTSSource(config.source);
var layer = new itowns.ElevationLayer(config.id, config);
view.addLayer(layer).then(menuGlobe.addLayerGUI.bind(menuGlobe));
}
itowns.Fetcher.json('./layers/JSONLayers/WORLD_DTM.json').then(addElevationLayerFromConfig);
itowns.Fetcher.json('./layers/JSONLayers/IGN_MNT_HIGHRES.json').then(addElevationLayerFromConfig);
// Display the content of a GeoJSON on terrain with ColorLayer and FileSource.
// The GeoJSON is loaded from url, set in FileSource
// Declare the source for the data on Ariege area
const ariegeSource = new itowns.FileSource({
url: 'https://raw.githubusercontent.com/gregoiredavid/france-geojson/master/departements/09-ariege/departement-09-ariege.geojson',
crs: 'EPSG:4326',
format: 'application/json',
});
// Create a ColorLayer for the Ariege area
const ariegeLayer = new itowns.ColorLayer('ariege', {
name: 'ariege',
transparent: true,
source: ariegeSource,
style: new itowns.Style({
fill: {
color: 'orange',
opacity: 0.5,
},
stroke: {
color: 'white',
},
}),
});
// Add the Ariege ColorLayer to the view and grant it a tooltip
view.addLayer(ariegeLayer).then(FeatureToolTip.addLayer);
// Display the content of a GeoJSON on terrain with ColorLayer and FileSource.
// The GeoJSON content is fetched from the file, then parsed and finally passed into FileSource data.
// The process is decomposed so that the fetching and parsing steps are visible.
// Fetch data from the GeoJSON file.
// Should you implement a custom fetcher, it would need to be called here.
itowns.Fetcher.json(
'https://raw.githubusercontent.com/gregoiredavid/france-geojson/master/departements/66-pyrenees-orientales/departement-66-pyrenees-orientales.geojson'
).then(function _(geojson) {
// Parses the fetched data into an itowns FeatureCollection.
// See http://www.itowns-project.org/itowns/docs/#api/Base/FeatureCollection.
// Should you implement a custom parser, it would need to be called here.
// The second parameter of the `parse` method we use here defines options for the transformation from
// data to FeatureCollection.
return itowns.GeoJsonParser.parse(geojson, {
// Information on the fetched data.
// See http://www.itowns-project.org/itowns/docs/#api/Source/ParsingOptions.
in: {
crs: 'EPSG:4326',
},
// Information on the FeatureCollection that should be created from the fetched data
// Here, we pass a FeatureBuildingOptions (http://www.itowns-project.org/itowns/docs/#api/Base/FeatureBuildingOptions)
out: {
crs: view.tileLayer.extent.crs,
buildExtent: true,
mergeFeatures: true,
structure: '2d',
},
});
}).then(function _(features) {
// Create a FileSource from the parsed FeatureCollection.
var pyoSource = new itowns.FileSource({ features });
var pyoStyle = new itowns.Style({
fill: {
pattern: 'images/cross.png',
opacity: 0.8,
},
stroke: {
color:'IndianRed',
},
});
// Create a ColorLayer to display the FeatureCollection.
var pyoLayer = new itowns.ColorLayer('pyrenees-orientales', {
name: 'pyrenees-orientales',
transparent: true,
source: pyoSource,
style: pyoStyle,
});
return view.addLayer(pyoLayer);
}).then(FeatureToolTip.addLayer).then(() => {
// Center the camera on the data extents
const layersExtent = ariegeSource.extent.clone();
layersExtent.union(view.getLayerById('pyrenees-orientales').source.extent);
view.controls.lookAtCoordinate(layersExtent, false);
});
debug.createTileDebugUI(menuGlobe.gui, view);
</script>
</body>
</html>