itowns
Version:
A JS/WebGL framework for 3D geospatial data visualization
143 lines (124 loc) • 5.72 kB
HTML
<html>
<head>
<title>Itowns - Planar + color layers from vector data</title>
<script type="importmap">
{
"imports": {
"itowns": "../dist/itowns.js",
"debug": "../dist/debug.js",
"dat": "https://unpkg.com/dat.gui@0.7.9/build/dat.gui.module.js",
"GuiTools": "./jsm/GUI/GuiTools.js",
"LoadingScreen": "./jsm/GUI/LoadingScreen.js",
"FeatureToolTip": "./jsm/plugins/FeatureToolTip.js",
"itowns_widgets": "../dist/itowns_widgets.js",
"three": "https://unpkg.com/three@0.170.0/build/three.module.js",
"three/addons/": "https://unpkg.com/three@0.170.0/examples/jsm/"
}
}
</script>
<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">
</head>
<body>
<div id="viewerDiv" class="viewer"></div>
<script type="module">
import GuiTools from 'GuiTools';
import setupLoadingScreen from 'LoadingScreen';
import * as THREE from 'three';
import * as itowns from 'itowns';
import * as debug from 'debug';
import * as itowns_widgets from 'itowns_widgets';
import FeatureToolTip from 'FeatureToolTip';
// # Orthographic viewer with one geojson layer and a TMS background layer
// Define geographic extent: CRS, min/max X, min/max Y
var extent = new itowns.Extent(
'EPSG:3857',
-20037508.34, 20037508.34,
-20048966.1, 20048966.1);
// `viewerDiv` will contain iTowns' rendering area (`<canvas>`)
var viewerDiv = document.getElementById('viewerDiv');
// Instanciate PlanarView (with ortho camera)
// By default itowns' tiles geometry have a "skirt" (ie they have a height),
// but in case of orthographic we don't need this feature, so disable it
var view = new itowns.PlanarView(viewerDiv, extent, {
disableSkirt: true,
maxSubdivisionLevel: 10,
camera: { type: itowns.CAMERA_TYPE.ORTHOGRAPHIC },
placement: new itowns.Extent('EPSG:3857', -20000000, 20000000, -20000000, 20000000),
controls: {
// Faster zoom in/out speed
zoomFactor: 3,
// prevent from zooming in too much
maxResolution: 0.005 // a pixel shall not represent a metric size smaller than 5 mm
},
});
var menuGlobe = new GuiTools('menuDiv', view, 300);
setupLoadingScreen(viewerDiv, view);
FeatureToolTip.init(viewerDiv, view);
// Add a TMS layer to have a background (OpenStreetMap)
// -> TMS imagery source
var opensmSource = new itowns.TMSSource({
isInverted: true,
url: 'https://tile.openstreetmap.org/${z}/${x}/${y}.png',
networkOptions: { crossOrigin: 'anonymous' },
extent,
crs: 'EPSG:3857',
attribution: {
name: 'OpenStreetMap',
url: 'http://www.openstreetmap.org/',
},
});
// -> TMS imagery layer
var opensmLayer = new itowns.ColorLayer('OPENSM', {
updateStrategy: {
type: itowns.STRATEGY_DICHOTOMY,
},
source: opensmSource,
});
view.addLayer(opensmLayer);
// Display the content of the GeoJSON file with ColorLayer and FileSource.
// The GeoJSON are loaded from url, set in FileSource
// Declare the source for the earthquakes data
const earthquakeSource = new itowns.FileSource({
url: 'https://raw.githubusercontent.com/iTowns/iTowns2-sample-data/master/' +
'geojson/Earthquakes_3857.geojson',
crs: 'EPSG:3857',
format: 'application/json',
});
function offset(properties) {
const radius = properties.mag;
return [ 0, -radius ];
}
// Create a ColorLayer with the earthquake information
const earthquakeLayer = new itowns.ColorLayer('earthquakes', {
source: earthquakeSource,
style: {
point: {
color: function (p) { return p.alert; },
radius: function (p) { return p.mag; },
line: 'black',
width: 0.5,
},
text: {
field: '{title}',
haloColor: 'black',
haloWidth: 1,
anchor: 'bottom',
offset: offset,
},
},
addLabelLayer: true,
});
// Add the earthquakes ColorLayer to the view and grant it a tooltip
view.addLayer(earthquakeLayer).then(FeatureToolTip.addLayer);
// Request redraw
view.notifyChange(true);
debug.createTileDebugUI(menuGlobe.gui, view);
window.view = view;
window.itowns = itowns;
window.THREE = THREE;
</script>
</body>
</html>