Display a map with TMS TIFF tiles in Float32 format.
You can implement your own ImageFormat
to load images in a non-standard MIME type (by default, only PNG/JPG/WEBP tiles are loaded by Giro3D).
import * as turf from '@turf/turf';
import { MapControls } from 'three/examples/jsm/controls/MapControls.js';
import XYZ from 'ol/source/XYZ.js';
import Extent from '@giro3d/giro3d/core/geographic/Extent.js';
import Instance from '@giro3d/giro3d/core/Instance.js';
import ElevationLayer from '@giro3d/giro3d/core/layer/ElevationLayer.js';
import Map from '@giro3d/giro3d/entities/Map.js';
import Inspector from '@giro3d/giro3d/gui/Inspector.js';
import GeoTIFFFormat from '@giro3d/giro3d/formats/GeoTIFFFormat.js';
import TiledImageSource from '@giro3d/giro3d/sources/TiledImageSource.js';
import Fetcher from '@giro3d/giro3d/utils/Fetcher';
import StatusBar from './widgets/StatusBar.js';
const x = -13602618.385789588;
const y = 5811042.273912458;
// Defines geographic extent: CRS, min/max X, min/max Y
const extent = new Extent(
'EPSG:3857',
x - 12000, x + 13000,
y - 4000, y + 26000,
);
// `viewerDiv` will contain giro3d' rendering area (the canvas element)
const viewerDiv = document.getElementById('viewerDiv');
// Creates a giro3d instance
const instance = new Instance(viewerDiv, {
crs: extent.crs(),
renderer: {
clearColor: 0x0a3b59,
},
});
// Creates a map that will contain the layer
const map = new Map('planar', {
extent,
hillshading: true,
segments: 128,
doubleSided: true,
discardNoData: true,
backgroundColor: 'white',
});
instance.add(map);
let footprint;
/**
* A function that will override the default intersection test for image sources (by default
* performing intersection on extents, i.e rectangles). Here we want to exclude tiles that do not
* intersect with the GeoJSON footprint of the dataset.
*
* @param {Extent} tileExtent The extent to test.
*/
function customIntersectionTest(tileExtent) {
if (!footprint) {
return true;
}
const corners = [
[tileExtent.topLeft().x(), tileExtent.topLeft().y()],
[tileExtent.topRight().x(), tileExtent.topRight().y()],
[tileExtent.bottomRight().x(), tileExtent.bottomRight().y()],
[tileExtent.bottomLeft().x(), tileExtent.bottomLeft().y()],
];
const extentAsPolygon = turf.helpers.polygon([[
corners[0],
corners[1],
corners[2],
corners[3],
corners[0],
]]);
const intersects = turf.booleanIntersects(turf.toWgs84(extentAsPolygon), footprint);
return intersects;
}
Fetcher.json('data/MtStHelens-footprint.geojson').then(geojson => {
footprint = turf.toWgs84(geojson);
const source = new TiledImageSource({
containsFn: customIntersectionTest, // Here we specify our custom intersection test
source: new XYZ({
minZoom: 10,
maxZoom: 16,
url: 'https://3d.oslandia.com/dem/MtStHelens-tiles/{z}/{x}/{y}.tif',
}),
format: new GeoTIFFFormat(),
});
map.addLayer(new ElevationLayer(
'osm',
{
extent,
source,
},
)).catch(e => console.error(e));
}).catch(e => console.error(e));
const center = extent.center().xyz();
instance.camera.camera3D.position.set(center.x, center.y - 1, 50000);
// Instanciates controls
const controls = new MapControls(instance.camera.camera3D, instance.domElement);
controls.target.copy(center);
instance.useTHREEControls(controls);
Inspector.attach(document.getElementById('panelDiv'), instance);
// Bind events
StatusBar.bind(instance);