itowns
Version:
A JS/WebGL framework for 3D geospatial data visualization
103 lines (88 loc) • 3.98 kB
HTML
<html>
<head>
<title>Itowns - Orthographic Camera Example</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",
"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">
<link rel="stylesheet" type="text/css" href="css/widgets.css">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
<div id="viewerDiv"></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';
// # Orthographic viewer
// Define geographic extent: CRS, min/max X, min/max Y
var extent = new itowns.Extent(
'EPSG:3857',
-20026376.39, 20026376.39,
-20048966.10, 20048966.10);
// `viewerDiv` will contain iTowns' rendering area (`<canvas>`)
var viewerDiv = document.getElementById('viewerDiv');
// Instanciate PlanarView
// 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, -8000000, 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
},
});
setupLoadingScreen(viewerDiv, view);
// Add a TMS imagery source
var opensmSource = new itowns.TMSSource({
isInverted: true,
// eslint-disable-next-line no-template-curly-in-string
url: 'https://watercolormaps.collection.cooperhewitt.org/tile/watercolor/${z}/${x}/${y}.jpg',
networkOptions: { crossOrigin: 'anonymous' },
extent,
crs: 'EPSG:3857',
attribution: {
name: 'OpenStreetMap',
url: 'http://www.openstreetmap.org/',
},
});
// Add a TMS imagery layer
var opensmLayer = new itowns.ColorLayer('OPENSM', {
updateStrategy: {
type: itowns.STRATEGY_DICHOTOMY,
},
source: opensmSource,
});
view.addLayer(opensmLayer);
// Add a scale :
const scale = new itowns_widgets.Scale(view, {
position: 'bottom-right',
translate: { x: -70 },
});
// Request redraw
view.notifyChange();
window.view = view;
window.itowns = itowns;
window.THREE = THREE;
</script>
</body>
</html>