CesiumJS complete code

The page contains the complete code that can be run and tested in Cesium Sandcastle

Make sure to fill in your sessions token for the first constant. Secondly, verify the BASEURL is the one applicable to your domain and change it otherwise.

const TOKEN = ""; // IMPORTANT: Place here the project session token between the ""
const BGCOLOR = "1f1f00"; // ff0000 is red, hexadecimal color
const SHADOW = true; //true ,false
const BASEMAP_INDEX = 0; // SATELLITE=0, TOPOGRAPHIC=1 and GRAY=2.
const STYLE = "COLORED"; // WHITE, COLORED
const SPACING = 10;
const TEXTURE = "MEDIUM"; // SMALL, MEDIUM , LARGE
const FEATURE_ID = "ID";
const BASEURL = "https://engine.tygron.com/web/";

// Constants
const dim = 128;
const minLevel = 6;
const maxLevel = 19;
const tilepx = 512;

// Construct the default list of terrain sources.
var terrainModels = [];
terrainModels.push(new Cesium.ProviderViewModel({
	name: "Project Terrain",
	category: "Terrain",       
    tooltip: "",
	iconUrl: Cesium.buildModuleUrl('Widgets/Images/TerrainProviders/Ellipsoid.png'),
	creationFunction: function () {
		return new Cesium.CustomHeightmapTerrainProvider({
			width: dim,
			height: dim,
			maximumLevel: maxLevel,
			callback: function (x, y, level) {
				if (level <= 10) { // ignore zoom levels 10 and lower
					return new Float32Array(dim * dim); // all zeros
				}
				const test = Cesium.Resource.fetchArrayBuffer(BASEURL+'terrain/' + level + '/' + x + '/' + y + '.bin?worlddatum=true&token='+TOKEN+'&width=' + dim + '&height=' + dim);
				return test.then(function (buffer) {
					const array = new Float32Array(dim * dim); // all zeros
					const view = new DataView(buffer);
					for (let i = 0; i < dim * dim; i++) {
						array[i] = view.getFloat32(i * 4);
					}
					return array;
				});
			},
		});
	}
}));

// Background imagery service
var imageryViewModels = [];
const baseMaps = ["SATELLITE", "TOPOGRAPHIC", "GRAY"];
	for (let i = 0; i < baseMaps.length; i++) {
	imageryViewModels.push(new Cesium.ProviderViewModel({
		name: baseMaps[i],
		category: "Base Map",
             tooltip: "",
      

		iconUrl: Cesium.buildModuleUrl('Widgets/Images/TerrainProviders/Ellipsoid.png'),
		creationFunction: function () {
			return new Cesium.WebMapServiceImageryProvider({
				url: BASEURL+'wms',
				layers: baseMaps[i],
				maximumLevel: maxLevel,
				tileHeight: tilepx,
				tileWidth: tilepx,
				getFeatureInfoFormats: [new Cesium.GetFeatureInfoFormat("json", "application/json")],
				proxy: new Cesium.DefaultProxy('/proxy/'),
				parameters: {
					crs: "4326",
					forcexy: "true",
					bgcolor: BGCOLOR,
					walled: "false",
					token: TOKEN
				},
				getFeatureInfoParameters: {
					crs: "4326",
					forcexy: "true",
					token: TOKEN,
				},
			});
		}
	}));
}

// Construct the viewer, with a high-res terrain source pre-selected.
var viewer = new Cesium.Viewer('cesiumContainer', {
	terrainProviderViewModels: terrainModels,
	selectedTerrainProviderViewModel: terrainModels[0],
	imageryProviderViewModels: imageryViewModels,
	selectedImageryProviderViewModel: imageryViewModels[BASEMAP_INDEX],
	animation: false,
	timeline: false,
	homeButton: false,
	navigationHelpButton: false,
	navigationInstructionsInitiallyVisible: false,
	fullscreenButton: false,
	shadows: SHADOW,
});

// Neighborhood labels
var neighborhoodUrl = new Cesium.Resource({
	url: BASEURL+"neighborhoods.geojson",
	queryParameters: {
		token: TOKEN,
		crs: "4326",
		forcexy: "true",
	}
});

var data = await neighborhoodUrl.fetchJson();
var labels = data.features;
for (var i = 0; i < labels.length; ++i) {
	var p = labels[i];
	var longitude = p.geometry.coordinates[0];
	var latitude = p.geometry.coordinates[1];
	var height = p.geometry.coordinates[2] == null ? 200 : p.geometry.coordinates[2] + 200;
	var id = p.properties[FEATURE_ID];
		const entity = viewer.entities.add({
		position: Cesium.Cartesian3.fromDegrees(longitude, latitude, height),
		label: {
			text: p.properties.name,
			font: "12pt arial",
			style: Cesium.LabelStyle.FILL_AND_OUTLINE,
			outlineWidth: 2,
			verticalOrigin: Cesium.VerticalOrigin.TOP,
			fillColor: Cesium.Color.WHITE,
		}
	});
}

/* Overlay Variables */
var overlayLayer = null;

const activateOverlay = function(overlayID, timeframe, difference){
    
  const provider = new Cesium.WebMapServiceImageryProvider({
	url: BASEURL+'wms',
	layers: overlayID,
	maximumLevel: maxLevel,
	tileHeight: tilepx,
	tileWidth: tilepx,
	proxy: new Cesium.DefaultProxy('/proxy/'),
	parameters: {
		crs: "4326",
		forcexy: "true",
		token: TOKEN,
		timeframe: timeframe,
		styles: difference ? "DIFFERENCE" : "",
	},
	getFeatureInfoParameters: {
		crs: "4326",
		forcexy: "true",
		token: TOKEN,
		timeframe: timeframe,
		styles: difference ? "DIFFERENCE" : "",
	}
});
    viewer.imageryLayers.remove(overlayLayer);
    var newOverlayLayer = new Cesium.ImageryLayer(provider, { minimumTerrainLevel: minLevel });
    viewer.imageryLayers.add(newOverlayLayer);
    if (overlayLayer !== null) {
	    overlayLayer.destroy();
    }
    overlayLayer = newOverlayLayer;
};

const start = async function () {	
	var tileset = await Cesium.Cesium3DTileset.fromUrl(BASEURL+'3dtiles/tileset.json?token='+TOKEN+'&style='+STYLE+'&spacing='+SPACING+'&texture='+TEXTURE);
	viewer.scene.primitives.add(tileset);
  
    var boundingSphere = tileset.root.boundingVolume._boundingSphere;
    viewer.camera.viewBoundingSphere(tileset.root.boundingVolume._boundingSphere);
    viewer.camera.flyToBoundingSphere(tileset.root.boundingVolume._boundingSphere);

    activateOverlay(1, 0, false);
};

start();

How-to's

• How to use CesiumJS to visualize data from a Session