Display a WFS layer.

100% © Métropole Grand Lyon, IGN

index.js
import { getUid } from 'ol';
import { Stroke, Style } from 'ol/style.js';
import { GeoJSON } from 'ol/format.js';
import TileWMS from 'ol/source/TileWMS.js';

import { MathUtils, Vector3, ColorRepresentation } from 'three';
import { MapControls } from 'three/examples/jsm/controls/MapControls.js';
import { CSS2DObject } from 'three/examples/jsm/renderers/CSS2DRenderer.js';

import Extent from '@giro3d/giro3d/core/geographic/Extent.js';
import Instance from '@giro3d/giro3d/core/Instance.js';
import Map from '@giro3d/giro3d/entities/Map.js';
import ColorLayer from '@giro3d/giro3d/core/layer/ColorLayer.js';
import Inspector from '@giro3d/giro3d/gui/Inspector.js';
import TiledImageSource from '@giro3d/giro3d/sources/TiledImageSource.js';
import VectorSource from '@giro3d/giro3d/sources/VectorSource.js';
import Coordinates from '@giro3d/giro3d/core/geographic/Coordinates';



// Define projection that we will use (taken from https://epsg.io/3946, Proj4js section)
Instance.registerCRS(
    'EPSG:3946',
    '+proj=lcc +lat_1=45.25 +lat_2=46.75 +lat_0=46 +lon_0=3 +x_0=1700000 +y_0=5200000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs',
);

// Define geographic extent: CRS, min/max X, min/max Y
const extent = new Extent('EPSG:3946', 1837816.94334, 1847692.32501, 5170036.4587, 5178412.82698);

// `viewerDiv` will contain Giro3D' rendering area (the canvas element)
const viewerDiv = document.getElementById('viewerDiv');

// Instantiate Giro3D
const instance = new Instance(viewerDiv, {
    crs: extent.crs(),
    renderer: {
        clearColor: 0x0a3b59,
    },
});

const map = new Map('map', { extent });
instance.add(map);

// Adds a WMS imagery layer
const colorSource = new TiledImageSource({
    source: new TileWMS({
        url: 'https://data.geopf.fr/wms-r',
        projection: 'EPSG:3946',
        params: {
            LAYERS: ['HR.ORTHOIMAGERY.ORTHOPHOTOS'],
            FORMAT: 'image/jpeg',
        },
    }),
});

const colorLayer = new ColorLayer({
    name: 'orthoimagery',
    extent,
    source: colorSource,
});
map.addLayer(colorLayer);

const featureColors = new window.Map();

function getColor(id) {
    if (featureColors.has(id)) {
        return featureColors.get(id);
    }
    const hue = MathUtils.randFloat(30, 340);
    const color = `hsl(${hue}, 70%, 50%)`;

    featureColors.set(id, color);
    return color;
}

const style = feature => {
    const id = getUid(feature);
    const highlight = feature.get('highlight');
    const width = highlight ? 10 : 6;
    const color = getColor(id);
    return [
        new Style({
            zIndex: highlight ? 10 : 0,
            stroke: new Stroke({
                color: 'white',
                width,
            }),
        }),
        new Style({
            zIndex: highlight ? 10 : 0,
            stroke: new Stroke({
                color,
                width: width - 2,
            }),
        }),
    ];
};

// Adds a WFS imagery layer
const wfsSource = new VectorSource({
    format: new GeoJSON(),
    dataProjection: 'EPSG:3946',
    data:
        'https://download.data.grandlyon.com/wfs/rdata' +
        '?SERVICE=WFS' +
        '&VERSION=2.0.0' +
        '&request=GetFeature' +
        '&typename=tcl_sytral.tcllignebus_2_0_0' +
        '&outputFormat=application/json;%20subtype=geojson' +
        '&SRSNAME=EPSG:3946' +
        '&startIndex=0',
    style,
});

const wfsLayer = new ColorLayer({
    name: 'lyon_tcl_bus',
    extent,
    source: wfsSource,
});

map.addLayer(wfsLayer);

// Creates controls
const controls = new MapControls(instance.camera.camera3D, instance.domElement);

instance.camera.camera3D.position.set(1839739, 5171618, 910);
controls.target = new Vector3(1840839, 5172718, 0);
controls.saveState();

controls.enableDamping = true;
controls.dampingFactor = 0.2;
controls.maxPolarAngle = Math.PI / 2.3;

instance.useTHREEControls(controls);

const labelElement = document.createElement('div');
labelElement.classList = 'badge rounded-pill text-bg-light';
labelElement.style.marginTop = '2rem';

const lineName = document.createElement('span');
lineName.style.marginLeft = '0.5rem';

const lineNumber = document.createElement('span');
lineNumber.classList = 'badge rounded-pill';
lineNumber.style.color = 'white';
lineNumber.style.background = 'red';
lineNumber.innerText = '32';

labelElement.appendChild(lineNumber);
labelElement.appendChild(lineName);

const label = new CSS2DObject(labelElement);

label.visible = false;
instance.add(label);

let previousFeature;

function pickFeatures(mouseEvent) {
    const pickResult = instance.pickObjectsAt(mouseEvent, {
        radius: 0,
    });

    const picked = pickResult.at(0);

    previousFeature?.set('highlight', false);

    function resetPickedFeatures() {
        previousFeature = null;
        if (label.visible) {
            instance.notifyChange(map);
            label.visible = false;
        }
    }

    if (picked) {
        const { x, y } = picked.point;
        const coordinates = new Coordinates(instance.referenceCrs, x, y);
        const features = wfsLayer.getVectorFeaturesAtCoordinate(coordinates, {
            radius: 3,
            xTileRes: 2,
            yTileRes: 2,
        });

        if (features.length > 0) {
            const firstFeature = features[features.length - 1];

            firstFeature.set('highlight', true);

            previousFeature = firstFeature;

            instance.notifyChange(map);
            label.position.set(x, y, 0);
            label.visible = true;
            lineNumber.style.background = getColor(getUid(firstFeature));
            lineNumber.innerText = firstFeature.get('ligne');
            lineName.innerText = firstFeature.get('nom_trace');
            label.updateMatrixWorld(true);
        } else {
            resetPickedFeatures();
        }
    } else {
        resetPickedFeatures();
    }
}

instance.domElement.addEventListener('mousemove', pickFeatures);
Inspector.attach(document.getElementById('panelDiv'), instance);
index.html
<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <title>Giro3D - WFS</title>
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-T3c6CoIi6uLrA9TneNEoa7RxnatzjcDSCmG1MXxSR1GAsXEV/Dwwykc2MPK8M2HN" crossorigin="anonymous">
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css">
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-C6RzsynM9kWDrMNeT87bh95OGNyZPhcTNXj1NW7RuBCsyN/o0jlpcV8Qyq46cDfL" crossorigin="anonymous"></script>
  <style>
    body {
      padding: 0;
      margin: 0;
      width: 100vw;
      height: 100vh;
    }

    #viewerDiv {
      width: 100%;
      height: 100%;
    }

    #panelDiv {
      position: absolute;
      top: 0;
      left: 0;
    }
    
  </style>
</head>

<body>
  <div id="viewerDiv"></div>
  <div id="panelDiv"></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>
package.json
{
  "name": "wfs",
  "dependencies": {
    "@giro3d/giro3d": "0.36.0",
    "colormap": "^2.3.2",
    "@turf/turf": "^6.5.0"
  },
  "devDependencies": {
    "vite": "^3.2.3"
  },
  "scripts": {
    "start": "vite",
    "build": "vite build"
  }
}