Display a point cloud from the Lidar HD project. Colorized with a WMS layer.

100% © IGN

Giro3D is capable of displaying large point clouds. Lidar data can be converted into 3D Tiles using py3dtiles

index.js 
import TileWMS from "ol/source/TileWMS.js";

import { Vector3, CubeTextureLoader } from "three";
import { MapControls } from "three/examples/jsm/controls/MapControls.js";

import Instance from "@giro3d/giro3d/core/Instance.js";
import ColorLayer from "@giro3d/giro3d/core/layer/ColorLayer.js";
import Tiles3D from "@giro3d/giro3d/entities/Tiles3D.js";
import Tiles3DSource from "@giro3d/giro3d/sources/Tiles3DSource.js";
import TiledImageSource from "@giro3d/giro3d/sources/TiledImageSource.js";
import Inspector from "@giro3d/giro3d/gui/Inspector.js";
import Extent from "@giro3d/giro3d/core/geographic/Extent.js";

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",
);

const tmpVec3 = new Vector3();

const instance = new Instance({
  target: "view",
  crs: "EPSG:2154",
});

const controls = new MapControls(instance.view.camera, instance.domElement);
controls.enableDamping = true;
controls.dampingFactor = 0.2;
instance.view.setControls(controls);

// Adds a WMS imagery layer
const wmsOthophotoSource = new TiledImageSource({
  source: new TileWMS({
    url: "https://data.geopf.fr/wms-r",
    projection: "EPSG:2154",
    crossOrigin: "anonymous",
    params: {
      LAYERS: ["HR.ORTHOIMAGERY.ORTHOPHOTOS"],
      FORMAT: "image/jpeg",
    },
  }),
});

const pointcloud = new Tiles3D(
  new Tiles3DSource("https://3d.oslandia.com/lidar_hd/tileset.json"),
);

// add pointcloud to scene
function initializeCameraPosition(layer) {
  const bbox = layer.root.bbox
    ? layer.root.bbox
    : layer.root.boundingVolume.box
        .clone()
        .applyMatrix4(layer.root.matrixWorld);

  // configure camera
  instance.view.camera.far = 2.0 * bbox.getSize(tmpVec3).length();

  const ratio = bbox.getSize(tmpVec3).x / bbox.getSize(tmpVec3).z;
  const position = bbox.min
    .clone()
    .add(bbox.getSize(tmpVec3).multiply({ x: 0, y: 0, z: ratio * 0.5 }));
  const lookAt = bbox.getCenter(tmpVec3);
  lookAt.z = bbox.min.z;
  instance.view.camera.position.set(position.x, position.y, position.z);
  instance.view.camera.lookAt(lookAt);
  controls.target.copy(lookAt);
  controls.saveState();

  const colorLayer = new ColorLayer({
    name: "orthophoto-ign",
    // The extent is useful to restrict the processing of the image layer
    // (which is much bigger than our point cloud).
    extent: Extent.fromBox3("EPSG:2154", bbox),
    source: wmsOthophotoSource,
  });

  pointcloud.attach(colorLayer);

  instance.renderingOptions.enableEDL = true;
  instance.renderingOptions.enableInpainting = true;
  instance.renderingOptions.enablePointCloudOcclusion = true;

  // refresh scene
  instance.notifyChange(instance.view.camera);
}
instance.add(pointcloud).then(initializeCameraPosition);

// 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("inspector", instance);
index.html 
<!doctype html>
<html lang="en">
  <head>
    <title>Pointcloud from IGN Lidar HD</title>
    <meta charset="UTF-8" />
    <meta name="name" content="lidar_hd" />
    <meta
      name="description"
      content="Display a point cloud from the Lidar HD project. Colorized with a WMS layer."
    />
    <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/examples/css/example.css"
    />
  </head>

  <body>
    <div id="view" class="m-0 p-0 w-100 h-100"></div>
    <div
      id="inspector"
      class="position-absolute top-0 start-0 mh-100 overflow-auto"
    ></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": "lidar_hd",
    "dependencies": {
        "@giro3d/giro3d": "0.41.0"
    },
    "devDependencies": {
        "vite": "^3.2.3"
    },
    "scripts": {
        "start": "vite",
        "build": "vite build"
    }
}