Pointcloud from IGN Lidar HD

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

import Extent from "@giro3d/giro3d/core/geographic/Extent.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 Inspector from "@giro3d/giro3d/gui/Inspector.js";
import WmtsSource from "@giro3d/giro3d/sources/WmtsSource.js";
import { MODE } from "@giro3d/giro3d/renderer/PointCloudMaterial.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);

const pointcloud = new Tiles3D({
  url: "https://3d.oslandia.com/lidar_hd/tileset.json",
  errorTarget: 15,
  pointCloudMode: MODE.TEXTURE,
});

// add pointcloud to scene

function initializeCameraPosition(entity) {
  const bbox = entity.getBoundingBox();

  // 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(new Vector3(0, 0, 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();

  // Let's build the color layer from the WMTS capabilities
  const url =
    "https://data.geopf.fr/wmts?SERVICE=WMTS&VERSION=1.0.0&REQUEST=GetCapabilities";
  WmtsSource.fromCapabilities(url, {
    layer: "HR.ORTHOIMAGERY.ORTHOPHOTOS",
  })
    .then((orthophotoWmts) => {
      pointcloud.setColorLayer(
        new ColorLayer({
          name: "color",
          extent: Extent.fromBox3("EPSG:2154", bbox),
          source: orthophotoWmts,
        }),
      );
    })
    .catch(console.error);

  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": "0.42.1"
    },
    "devDependencies": {
        "vite": "^3.2.3"
    },
    "scripts": {
        "start": "vite",
        "build": "vite build"
    }
}