Building informations
?These informations are the feature properties embedded in the return value from the WFS server
Use data sources provided by the french geographic provider (IGN).
Display a map of France with various IGN datasets (elevation, extruded WFS and orthophotography).
import {
Vector3,
CubeTextureLoader,
DirectionalLight,
AmbientLight,
Fog,
Color,
MathUtils,
} from 'three';
import { MapControls } from 'three/examples/jsm/controls/MapControls.js';
import GeoJSON from 'ol/format/GeoJSON.js';
import VectorSource from 'ol/source/Vector.js';
import { createXYZ } from 'ol/tilegrid.js';
import { tile } from 'ol/loadingstrategy.js';
import Instance from '@giro3d/giro3d/core/Instance.js';
import Extent from '@giro3d/giro3d/core/geographic/Extent.js';
import WmtsSource from '@giro3d/giro3d/sources/WmtsSource.js';
import ColorLayer from '@giro3d/giro3d/core/layer/ColorLayer.js';
import ElevationLayer from '@giro3d/giro3d/core/layer/ElevationLayer.js';
// NOTE: changing the imported name because we use the native `Map` object in this example.
import Giro3dMap from '@giro3d/giro3d/entities/Map.js';
import Inspector from '@giro3d/giro3d/gui/Inspector.js';
import BilFormat from '@giro3d/giro3d/formats/BilFormat.js';
import FeatureCollection from '@giro3d/giro3d/entities/FeatureCollection.js';
// Defines projection that we will use (taken from https://epsg.io/2154, Proj4js section)
Instance.registerCRS(
'EPSG:2154',
'+proj=lcc +lat_0=46.5 +lon_0=3 +lat_1=49 +lat_2=44 +x_0=700000 +y_0=6600000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs',
);
Instance.registerCRS(
'IGNF:WGS84G',
'GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]',
);
const SKY_COLOR = new Color(0xf1e9c6);
const viewerDiv = document.getElementById('viewerDiv');
const instance = new Instance(viewerDiv, { crs: 'EPSG:2154', renderer: { clearColor: SKY_COLOR } });
const extent = new Extent('EPSG:2154', -111629.52, 1275028.84, 5976033.79, 7230161.64);
// create a map
const map = new Giro3dMap('planar', {
extent,
backgroundColor: 'gray',
hillshading: {
enabled: true,
elevationLayersOnly: true,
},
discardNoData: true,
doubleSided: true,
});
instance.add(map);
const noDataValue = -1000;
const url = 'https://data.geopf.fr/wmts?SERVICE=WMTS&VERSION=1.0.0&REQUEST=GetCapabilities';
// Let's build the elevation layer from the WMTS capabilities
WmtsSource.fromCapabilities(url, {
layer: 'ELEVATION.ELEVATIONGRIDCOVERAGE.HIGHRES',
format: new BilFormat(),
noDataValue,
})
.then(elevationWmts => {
map.addLayer(
new ElevationLayer({
name: 'elevation',
extent: map.extent,
// We don't need the full resolution of terrain
// because we are not using any shading. This will save a lot of memory
// and make the terrain faster to load.
resolutionFactor: 0.25,
minmax: { min: 0, max: 5000 },
noDataOptions: {
replaceNoData: false,
},
source: elevationWmts,
}),
);
})
.catch(console.error);
// Let's build the color layer from the WMTS capabilities
WmtsSource.fromCapabilities(url, {
layer: 'HR.ORTHOIMAGERY.ORTHOPHOTOS',
})
.then(orthophotoWmts => {
map.addLayer(
new ColorLayer({
name: 'color',
extent: map.extent,
source: orthophotoWmts,
}),
);
})
.catch(console.error);
const buildingSource = new VectorSource({
format: new GeoJSON(),
url: function url(bbox) {
return `${
'https://data.geopf.fr/wfs/ows' +
'?SERVICE=WFS' +
'&VERSION=2.0.0' +
'&request=GetFeature' +
'&typename=BDTOPO_V3:batiment' +
'&outputFormat=application/json' +
'&SRSNAME=EPSG:2154' +
'&startIndex=0' +
'&bbox='
}${bbox.join(',')},EPSG:2154`;
},
strategy: tile(createXYZ({ tileSize: 512 })),
});
const hoverColor = new Color('yellow');
// This is the style function that will assign a different style depending on a feature's attribute.
// The `feature` argument is an OpenLayers feature.
const buildingStyle = feature => {
const properties = feature.getProperties();
let fillColor = '#FFFFFF';
const hovered = properties.hovered ?? false;
const clicked = properties.clicked ?? false;
switch (properties.usage_1) {
case 'Industriel':
fillColor = '#f0bb41';
break;
case 'Agricole':
fillColor = '#96ff0d';
break;
case 'Religieux':
fillColor = '#41b5f0';
break;
case 'Sportif':
fillColor = '#ff0d45';
break;
case 'Résidentiel':
fillColor = '#cec8be';
break;
case 'Commercial et services':
fillColor = '#d8ffd4';
break;
}
const fill = clicked
? 'yellow'
: hovered
? new Color(fillColor).lerp(hoverColor, 0.2) // Let's use a slightly brighter color for hover
: fillColor;
return {
fill: {
color: fill,
},
stroke: {
color: clicked ? 'yellow' : hovered ? 'white' : 'black',
lineWidth: clicked ? 5 : undefined,
},
};
};
// Let's compute the extrusion offset of building polygons to give them walls.
const extrusionOffsetCallback = feature => {
const properties = feature.getProperties();
const buildingHeight = properties['hauteur'];
const extrusionOffset = -buildingHeight;
if (Number.isNaN(extrusionOffset)) {
return null;
}
return extrusionOffset;
};
const featureCollection = new FeatureCollection('buildings', {
source: buildingSource,
extent,
extrusionOffset: extrusionOffsetCallback,
style: buildingStyle,
minLevel: 11,
maxLevel: 11,
});
instance.add(featureCollection);
// To make sure that the buildings remain correctly displayed whenever
// one entity become transparent (i.e it's opacity is less than 1), we need
// to set the render of the feature collection to be greater than the map's.
map.renderOrder = 0;
featureCollection.renderOrder = 1;
// also add some lights
const sun = new DirectionalLight('#ffffff', 2);
sun.position.set(1, 0, 1).normalize();
sun.updateMatrixWorld(true);
instance.scene.add(sun);
// We can look below the floor, so let's light also a bit there
const sun2 = new DirectionalLight('#ffffff', 0.5);
sun2.position.set(0, 1, 1);
sun2.updateMatrixWorld();
instance.scene.add(sun2);
// ambient
const ambientLight = new AmbientLight(0xffffff, 0.2);
instance.scene.add(ambientLight);
// place camera above Grenoble
instance.camera.camera3D.position.set(913349.2364044407, 6456426.459171033, 1706.0108044011636);
// and look at the Bastille
const lookAt = new Vector3(913896, 6459191, 200);
instance.camera.camera3D.lookAt(lookAt);
// Notify Giro3D we've changed the three.js camera position directly
instance.notifyChange(instance.camera.camera3D);
// Creates controls
const controls = new MapControls(instance.camera.camera3D, instance.domElement);
controls.enableDamping = true;
controls.dampingFactor = 0.4;
// you need to use these 2 lines each time you change the camera lookAt or position programatically
controls.target.copy(lookAt);
controls.saveState();
instance.useTHREEControls(controls);
// add a skybox background
const cubeTextureLoader = new CubeTextureLoader();
cubeTextureLoader.setPath('image/skyboxsun25deg_zup/');
const cubeTexture = cubeTextureLoader.load([
'px.jpg',
'nx.jpg',
'py.jpg',
'ny.jpg',
'pz.jpg',
'nz.jpg',
]);
instance.scene.background = cubeTexture;
Inspector.attach(document.getElementById('panelDiv'), instance);
// information on click
const resultTable = document.getElementById('results');
let lastCameraPosition = new Vector3(0, 0, 0);
const tempVec3 = new Vector3(0, 0, 0);
function truncate(value, length) {
if (value == null) {
return null;
}
const text = `${value}`;
if (text.length < length) {
return text;
}
return text.substring(0, length) + '…';
}
// Fill the attribute table with the objects' attributes.
function fillTable(objects) {
resultTable.innerHTML = '';
document.getElementById('card').style.display = objects.length > 0 ? 'block' : 'none';
for (const obj of objects) {
if (!obj.userData.feature) {
continue;
}
const p = obj.userData.feature.getProperties();
const entries = [];
for (const [key, value] of Object.entries(p)) {
if (key !== 'geometry' && key !== 'clicked' && key !== 'hovered') {
const entry = `<tr>
<td title="${key}"><code>${truncate(key, 12)}</code></td>
<td title="${value}">${truncate(value, 18) ?? '<code>null</code>'}</td>
</tr>`;
entries.push(entry);
}
}
resultTable.innerHTML += `
<table class="table table-sm table-striped">
<thead>
<tr>
<th scope="col">Name</th>
<th scope="col">Value</th>
</tr>
</thead>
<tbody>
${entries.join('')}
</tbody>
</table>
`;
}
}
const previousHovered = [];
const previousClicked = [];
const objectsToUpdate = [];
function pick(e, click) {
const pickedObjects = instance.pickObjectsAt(e, {
where: [featureCollection],
});
if (click) {
previousClicked.forEach(obj => obj.userData.feature.set('clicked', false));
} else {
previousHovered.forEach(obj => obj.userData.feature.set('hovered', false));
}
const property = click ? 'clicked' : 'hovered';
objectsToUpdate.length = 0;
if (pickedObjects.length > 0) {
const picked = pickedObjects[0];
const obj = picked.object;
const { feature } = obj.userData;
feature.set(property, true);
objectsToUpdate.push(obj);
}
if (click) {
fillTable(objectsToUpdate);
}
// To avoid updating all the objects and lose a lot of performance,
// we only update the objects that have changed.
const updatedObjects = [...previousHovered, ...previousClicked, ...objectsToUpdate];
if (click) {
previousClicked.splice(0, previousClicked.length, ...objectsToUpdate);
} else {
previousHovered.splice(0, previousHovered.length, ...objectsToUpdate);
}
if (updatedObjects.length > 0) {
featureCollection.updateStyles(updatedObjects);
}
}
const hover = e => pick(e, false);
const click = e => pick(e, true);
instance.domElement.addEventListener('mousemove', hover);
instance.domElement.addEventListener('click', click);
const DOWN_VECTOR = new Vector3(0, 0, -1);
const EARTH_RADIUS = 6_3781_000;
const tmpVec3 = new Vector3();
const fog = new Fog(SKY_COLOR, 1, 2);
instance.scene.fog = fog;
function processFogAndClippingPlanes(camera) {
// Compute the tilt, in radians, of the camera.
const tilt = DOWN_VECTOR.angleTo(camera.camera3D.getWorldDirection(tmpVec3));
const altitude = MathUtils.clamp(camera.camera3D.position.z, 20, 100000);
const maxFarPlane = 9_999_999;
const actualTilt = MathUtils.clamp(tilt, 0, Math.PI / 3);
const horizon = Math.sqrt(2 * altitude * EARTH_RADIUS) * 0.2;
camera.maxFarPlane = MathUtils.mapLinear(actualTilt, 0, Math.PI / 3, maxFarPlane, horizon);
fog.far = camera.far;
fog.near = MathUtils.lerp(camera.near, camera.far, 0.2);
}
instance.addEventListener('after-camera-update', event =>
processFogAndClippingPlanes(event.camera),
);
processFogAndClippingPlanes(instance.camera);
// Bind events
<!doctype html>
<html lang="en">
<head>
<title>IGN data</title>
<meta charset="UTF-8" />
<meta name="name" content="ign_data" />
<meta name="description" content="Use data sources provided by the french geographic provider (IGN)." />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link rel="icon" href="https://giro3d.org/images/favicon.svg" />
<link href="https://giro3d.org/assets/bootstrap-custom.css" rel="stylesheet" />
<script src="https://giro3d.org/assets/bootstrap.bundle.min.js"></script>
<link
rel="stylesheet"
type="text/css"
href="https://giro3d.org/latest/css/example.css"
/>
</head>
<body>
<div id="viewerDiv" class="m-0 p-0 w-100 h-100"></div>
<div id="panelDiv" class="position-absolute top-0 start-0 mh-100 overflow-auto"></div>
<div class="side-pane-with-status-bar pe-none" style="display: none" id="card">
<div class="card">
<h5 class="card-header">Building informations</h5>
<!-- tooltip -->
<span
class="badge bg-secondary position-absolute top-0 end-0 m-2"
data-bs-toggle="popover"
data-bs-content="pickingHelper"
>?</span
>
<p class="card-text d-none" id="pickingHelper">
These informations are the feature properties embedded in the return value from the WFS
server
</p>
<div class="card-body">
<!-- Result table -->
<div id="results"></div>
</div>
</div>
</div>
<script type="module" src="index.js"></script>
<script>
/* activate popovers */
const popoverTriggerList = [].slice.call(
document.querySelectorAll('[data-bs-toggle="popover"]'),
);
popoverTriggerList.map(
// bootstrap is used as script in the template, disable warning about undef
// eslint-disable-next-line no-undef
popoverTriggerEl =>
new bootstrap.Popover(popoverTriggerEl, {
trigger: 'hover',
placement: 'left',
content: document.getElementById(
popoverTriggerEl.getAttribute('data-bs-content'),
).innerHTML,
html: true,
}),
);
</script>
</body>
</html>
{
"name": "ign_data",
"dependencies": {
"@giro3d/giro3d": "0.38.5"
},
"devDependencies": {
"vite": "^3.2.3"
},
"scripts": {
"start": "vite",
"build": "vite build"
}
}