Photorealistic 3D Tiles are in the OGC standard glTF format, meaning you can use any renderer that supports the OGC 3D Tiles spec to build your 3D visualizations. For example, Cesium is a foundational open source library for rendering 3D visualizations.
Work with CesiumJS
CesiumJS is an open source Javascript library for 3D visualization on the web. For more information about using CesiumJS, see Learn CesiumJS.
User controls
The CesiumJS tile renderer has a standard set of user controls.
| Action | Description |
|---|---|
| Pan view | Left click & drag |
| Zoom view | Right click & drag, or scroll the mouse wheel |
| Rotate view | Ctrl + left/right click & drag, or middle click & drag |
Best practices
There are several approaches that you can take to decrease CesiumJS 3D loading times. For example:
Enable simultaneous requests by adding the following statement to your rendering HTML:
Cesium.RequestScheduler.requestsByServer["tile.googleapis.com:443"] = <REQUEST_COUNT>The higher the
REQUEST_COUNT, the quicker the tiles load. However, when loading in a Chrome browser withREQUEST_COUNTgreater than 10 and cache disabled, you might run into a known Chrome issue. For most use cases, we recommend aREQUEST_COUNTof 18 for optimal performance.Enable skipping levels of detail. For more information, see this Cesium issue.
Ensure that you properly display data attributions by enabling
showCreditsOnScreen: true. For more information, see
Policies.
Rendering metrics
To find the framerate, look at how many times per second the requestAnimationFrame method is called.
To see how the frame latency is calculated, take a look at the PerformanceDisplay class.
CesiumJS renderer examples
You can use the CesiumJS renderer with Map Tiles API's 3D Tiles by simply supplying the root tileset URL.
Simple example
The following example initializes the CesiumJS renderer, and then loads the root tileset.
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<title>CesiumJS 3D Tiles Simple Demo</title>
<script src="https://ajax.googleapis.com/ajax/libs/cesiumjs/1.105/Build/Cesium/Cesium.js"></script>
<link href="https://ajax.googleapis.com/ajax/libs/cesiumjs/1.105/Build/Cesium/Widgets/widgets.css" rel="stylesheet">
</head>
<body>
<div id="cesiumContainer"></div>
<script>
// Enable simultaneous requests.
Cesium.RequestScheduler.requestsByServer["tile.googleapis.com:443"] = 18;
// Create the viewer.
const viewer = new Cesium.Viewer('cesiumContainer', {
imageryProvider: false,
baseLayerPicker: false,
geocoder: false,
globe: false,
// https://cesium.com/blog/2018/01/24/cesium-scene-rendering-performance/#enabling-request-render-mode
requestRenderMode: true,
});
// Add 3D Tiles tileset.
const tileset = viewer.scene.primitives.add(new Cesium.Cesium3DTileset({
url: "https://tile.googleapis.com/v1/3dtiles/root.json?key=YOUR_API_KEY",
// This property is needed to appropriately display attributions
// as required.
showCreditsOnScreen: true,
}));
</script>
</body>
For information about requestRenderMode, see
Enabling request render mode.
The HTML page renders as shown here.
Places API integration
You can use CesiumJS with the Places API to retrieve more information. You can use the Autocomplete widget to fly to the viewport of Places. This example uses the Places Autocomplete API, which is enabled by following these instructions, and the Maps JavaScript API, which is enabled by following these instructions.
<!DOCTYPE html>
<head>
<meta charset="utf-8" />
<title>CesiumJS 3D Tiles Places API Integration Demo</title>
<script src="https://ajax.googleapis.com/ajax/libs/cesiumjs/1.105/Build/Cesium/Cesium.js"></script>
<link href="https://ajax.googleapis.com/ajax/libs/cesiumjs/1.105/Build/Cesium/Widgets/widgets.css" rel="stylesheet">
</head>
<body>
<label for="pacViewPlace">Go to a place: </label>
<input
type="text"
id="pacViewPlace"
name="pacViewPlace"
placeholder="Enter a location..."
style="width: 300px"
/>
<div id="cesiumContainer"></div>
<script>
// Enable simultaneous requests.
Cesium.RequestScheduler.requestsByServer["tile.googleapis.com:443"] = 18;
// Create the viewer.
const viewer = new Cesium.Viewer("cesiumContainer", {
imageryProvider: false,
baseLayerPicker: false,
requestRenderMode: true,
geocoder: false,
globe: false,
});
// Add 3D Tiles tileset.
const tileset = viewer.scene.primitives.add(
new Cesium.Cesium3DTileset({
url: "https://tile.googleapis.com/v1/3dtiles/root.json?key=YOUR_API_KEY",
// This property is required to display attributions as required.
showCreditsOnScreen: true,
})
);
const zoomToViewport = (viewport) => {
viewer.entities.add({
polyline: {
positions: Cesium.Cartesian3.fromDegreesArray([
viewport.getNorthEast().lng(), viewport.getNorthEast().lat(),
viewport.getSouthWest().lng(), viewport.getNorthEast().lat(),
viewport.getSouthWest().lng(), viewport.getSouthWest().lat(),
viewport.getNorthEast().lng(), viewport.getSouthWest().lat(),
viewport.getNorthEast().lng(), viewport.getNorthEast().lat(),
]),
width: 10,
clampToGround: true,
material: Cesium.Color.RED,
},
});
viewer.flyTo(viewer.entities);
};
function initAutocomplete() {
const autocomplete = new google.maps.places.Autocomplete(
document.getElementById("pacViewPlace"),
{
fields: [
"geometry",
"name",
],
}
);
autocomplete.addListener("place_changed", () => {
viewer.entities.removeAll();
const place = autocomplete.getPlace();
if (!place.geometry || !place.geometry.viewport) {
window.alert("No viewport for input: " + place.name);
return;
}
zoomToViewport(place.geometry.viewport);
});
}
</script>
<script
async=""
src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=places&callback=initAutocomplete"
></script>
</body>
Rotating drone view
You can control the camera to animate through the tileset. When combined with the Places API and the Elevation API, this animation simulates an interactive drone flyover of any point of interest.
This code sample flies you around the place that you selected in the Autocomplete widget.
<!DOCTYPE html>
<head>
<meta charset="utf-8" />
<title>CesiumJS 3D Tiles Rotating Drone View Demo</title>
<script src="https://ajax.googleapis.com/ajax/libs/cesiumjs/1.105/Build/Cesium/Cesium.js"></script>
<link href="https://ajax.googleapis.com/ajax/libs/cesiumjs/1.105/Build/Cesium/Widgets/widgets.css" rel="stylesheet">
</head>
<body>
<label for="pacViewPlace">Go to a place: </label>
<input type="text" id="pacViewPlace" name="pacViewPlace" placeholder="Enter a location..." style="width: 300px" />
<div id="cesiumContainer"></div>
<script>
// Enable simultaneous requests.
Cesium.RequestScheduler.requestsByServer["tile.googleapis.com:443"] = 18;
// Create the viewer and remove unneeded options.
const viewer = new Cesium.Viewer("cesiumContainer", {
imageryProvider: false,
baseLayerPicker: false,
homeButton: false,
fullscreenButton: false,
navigationHelpButton: false,
vrButton: false,
sceneModePicker: false,
geocoder: false,
globe: false,
infobox: false,
selectionIndicator: false,
timeline: false,
projectionPicker: false,
clockViewModel: null,
animation: false,
requestRenderMode: true,
});
// Add 3D Tile set.
const tileset = viewer.scene.primitives.add(
new Cesium.Cesium3DTileset({
url: "https://tile.googleapis.com/v1/3dtiles/root.json?key=YOUR_API_KEY",
// This property is required to display attributions.
showCreditsOnScreen: true,
})
);
// Point the camera at a location and elevation, at a viewport-appropriate distance.
function pointCameraAt(location, viewport, elevation) {
const distance = Cesium.Cartesian3.distance(
Cesium.Cartesian3.fromDegrees(
viewport.getSouthWest().lng(), viewport.getSouthWest().lat(), elevation),
Cesium.Cartesian3.fromDegrees(
viewport.getNorthEast().lng(), viewport.getNorthEast().lat(), elevation)
) / 2;
const target = new Cesium.Cartesian3.fromDegrees(location.lng(), location.lat(), elevation);
const pitch = -Math.PI / 4;
const heading = 0;
viewer.camera.lookAt(target, new Cesium.HeadingPitchRange(heading, pitch, distance));
}
// Rotate the camera around a location and elevation, at a viewport-appropriate distance.
let unsubscribe = null;
function rotateCameraAround(location, viewport, elevation) {
if(unsubscribe) unsubscribe();
pointCameraAt(location, viewport, elevation);
unsubscribe = viewer.clock.onTick.addEventListener(() => {
viewer.camera.rotate(Cesium.Cartesian3.UNIT_Z);
});
}
function initAutocomplete() {
const autocomplete = new google.maps.places.Autocomplete(
document.getElementById("pacViewPlace"), {
fields: [
"geometry",
"name",
],
}
);
autocomplete.addListener("place_changed", async () => {
const place = autocomplete.getPlace();
if (!(place.geometry && place.geometry.viewport && place.geometry.location)) {
window.alert(`Insufficient geometry data for place: ${place.name}`);
return;
}
// Get place elevation using the ElevationService.
const elevatorService = new google.maps.ElevationService();
const elevationResponse = await elevatorService.getElevationForLocations({
locations: [place.geometry.location],
});
if(!(elevationResponse.results && elevationResponse.results.length)){
window.alert(`Insufficient elevation data for place: ${place.name}`);
return;
}
const elevation = elevationResponse.results[0].elevation || 10;
rotateCameraAround(
place.geometry.location,
place.geometry.viewport,
elevation
);
});
}
</script>
<script async src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=places&callback=initAutocomplete"></script>
</body>
Draw polylines and labels
This code sample demonstrates how to add polylines and labels to a map. You can add polylines to a map to show driving and walking directions, or to show property boundaries, or to calculate driving and walking durations. You can also get attributes without actually rendering the scene.
You could take users on a curated tour of a neighborhood, or you could show neighboring properties that are currently on sale, and then you could add 3D objects such as billboards to the scene.
You could summarize a trip, listing the properties that you viewed, displaying these details in virtual objects.
<!DOCTYPE html>
<head>
<meta charset="utf-8" />
<title>CesiumJS 3D Tiles Polyline and Label Demo</title>
<script src="https://ajax.googleapis.com/ajax/libs/cesiumjs/1.105/Build/Cesium/Cesium.js"></script>
<link
href="https://ajax.googleapis.com/ajax/libs/cesiumjs/1.105/Build/Cesium/Widgets/widgets.css"
rel="stylesheet"
/>
</head>
<body>
<div id="cesiumContainer"></div>
<script>
// Enable simultaneous requests.
Cesium.RequestScheduler.requestsByServer["tile.googleapis.com:443"] = 18;
// Create the viewer.
const viewer = new Cesium.Viewer("cesiumContainer", {
imageryProvider: false,
baseLayerPicker: false,
requestRenderMode: true,
geocoder: false,
globe: false,
});
// Add 3D Tiles tileset.
const tileset = viewer.scene.primitives.add(
new Cesium.Cesium3DTileset({
url: "https://tile.googleapis.com/v1/3dtiles/root.json?key=YOUR_API_KEY",
// This property is required to display attributions as required.
showCreditsOnScreen: true,
})
);
// Draws a circle at the position, and a line from the previous position.
const drawPointAndLine = (position, prevPosition) => {
viewer.entities.removeAll();
if (prevPosition) {
viewer.entities.add({
polyline: {
positions: [prevPosition, position],
width: 3,
material: Cesium.Color.WHITE,
clampToGround: true,
classificationType: Cesium.ClassificationType.CESIUM_3D_TILE,
},
});
}
viewer.entities.add({
position: position,
ellipsoid: {
radii: new Cesium.Cartesian3(1, 1, 1),
material: Cesium.Color.RED,
},
});
};
// Compute, draw, and display the position's height relative to the previous position.
var prevPosition;
const processHeights = (newPosition) => {
drawPointAndLine(newPosition, prevPosition);
const newHeight = Cesium.Cartographic.fromCartesian(newPosition).height;
let labelText = "Current altitude (meters above sea level):\n\t" + newHeight;
if (prevPosition) {
const prevHeight =
Cesium.Cartographic.fromCartesian(prevPosition).height;
labelText += "\nHeight from previous point (meters):\n\t" + Math.abs(newHeight - prevHeight);
}
viewer.entities.add({
position: newPosition,
label: {
text: labelText,
disableDepthTestDistance: Number.POSITIVE_INFINITY,
pixelOffset: new Cesium.Cartesian2(0, -10),
showBackground: true,
verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
}
});
prevPosition = newPosition;
};
const handler = new Cesium.ScreenSpaceEventHandler(viewer.canvas);
handler.setInputAction(function (event) {
const earthPosition = viewer.scene.pickPosition(event.position);
if (Cesium.defined(earthPosition)) {
processHeights(earthPosition);
}
}, Cesium.ScreenSpaceEventType.LEFT_CLICK);
</script>
</body>
Camera orbit
In Cesium, you can orbit the camera around a point of interest, avoiding collisions with buildings. Alternatively, you can make buildings transparent when the camera moves through them.
First, lock the camera onto a point, then you can create a camera orbit to
showcase your asset. You can do this by using the camera’s
lookAtTransform
function with an event listener, as demonstrated in this code sample.
// Lock the camera onto a point.
const center = Cesium.Cartesian3.fromRadians(
2.4213211833389243,
0.6171926869414084,
3626.0426275055174
);
const transform = Cesium.Transforms.eastNorthUpToFixedFrame(center);
viewer.scene.camera.lookAtTransform(
transform,
new Cesium.HeadingPitchRange(0, -Math.PI / 8, 2900)
);
// Orbit around this point.
viewer.clock.onTick.addEventListener(function (clock) {
viewer.scene.camera.rotateRight(0.005);
});
For more information about controlling the camera, see Control the camera
Work with Cesium for Unreal
To use the Cesium for Unreal Plugin with the 3D Tiles API, follow the steps below.
Install the Cesium for Unreal plugin.
Create a new Unreal project.
Connect to Google Photorealistic 3D Tiles API.
Open the Cesium window by selecting Cesium > Cesium from the menu.
Select Blank 3D Tiles Tileset.
In the World Outliner, open the Details panel by selecting this Cesium3DTileset.
Change the Source from From Cesium Ion to From URL.
Set the URL to be the Google 3D Tiles URL.
https://tile.googleapis.com/v1/3dtiles/root.json?key=YOUR_API_KEY- Enable Show Credits On Screen to properly display attributions.
This loads the world. To move to any LatLng, select the CesiumGeoreference item in the Outliner panel, and then edit the Origin Latitude/Longitude/Height in the Details panel.
Work with Cesium for Unity
To use photorealistic tiles with Cesium for Unity, follow the steps below.
Create a new Unity project.
Add a new Scoped Registry in the Package Manager section (through Editor > Project Settings).
Name: Cesium
URL: https://unity.pkg.cesium.com
Scope(s): com.cesium.unity
Install the Cesium for Unity package.
Connect to the Google Photorealistic 3D Tiles API.
Open the Cesium window by selecting Cesium > Cesium from the menu.
Click Blank 3D Tiles Tileset.
On the left-side panel, in the Tileset Source option under Source, select From URL (instead of From Cesium Ion).
Set the URL to the Google 3D Tiles URL.
https://tile.googleapis.com/v1/3dtiles/root.json?key=YOUR_API_KEY- Enable Show Credits On Screen to properly display attributions.
This loads the world. To move to any LatLng, select the CesiumGeoreference item in the Scene Hierarchy, and then edit the Origin Latitude/Longitude/Height in the Inspector.
Work with deck.gl
deck.gl, powered by WebGL, is an open source JavaScript framework for high-performance, large-scale data visualizations.
Attribution
Ensure that you properly display data attributions by extracting the copyright
field from tiles gltf asset, and then displaying it on the rendered view. For
more information, see
Display data attributions.
deck.gl renderer examples
Simple example
The following example initializes the deck.gl renderer, and then loads a place in 3D. In your code, be sure to replace YOUR_API_KEY with your actual API key.
<!DOCTYPE html>
<html>
<head>
<title>deck.gl Photorealistic 3D Tiles example</title>
<script src="https://unpkg.com/deck.gl@latest/dist.min.js"></script>
<style>
body { margin: 0; padding: 0;}
#map { position: absolute; top: 0;bottom: 0;width: 100%;}
#credits { position: absolute; bottom: 0; right: 0; padding: 2px; font-size: 15px; color: white;
text-shadow: -1px 0 black, 0 1px black, 1px 0 black, 0 -1px black;}
</style>
</head>
<body>
<div id="map"></div>
<div id="credits"></div>
<script>
const GOOGLE_API_KEY = YOUR_API_KEY;
const TILESET_URL = `https://tile.googleapis.com/v1/3dtiles/root.json`;
const creditsElement = document.getElementById('credits');
new deck.DeckGL({
container: 'map',
initialViewState: {
latitude: 50.0890,
longitude: 14.4196,
zoom: 16,
bearing: 90,
pitch: 60,
height: 200
},
controller: {minZoom: 8},
layers: [
new deck.Tile3DLayer({
id: 'google-3d-tiles',
data: TILESET_URL,
loadOptions: {
fetch: {
headers: {
'X-GOOG-API-KEY': GOOGLE_API_KEY
}
}
},
onTilesetLoad: tileset3d => {
tileset3d.options.onTraversalComplete = selectedTiles => {
const credits = new Set();
selectedTiles.forEach(tile => {
const {copyright} = tile.content.gltf.asset;
copyright.split(';').forEach(credits.add, credits);
creditsElement.innerHTML = [...credits].join('; ');
});
return selectedTiles;
}
}
})
]
});
</script>
</body>
</html>
Visualize 2D layers on top of Google Photorealistic 3D Tiles
The deck.gl TerrainExtension renders otherwise 2D data onto a 3D surface. For example, you can drape the GeoJSON of a building footprint on top of the Photorealistic 3D Tiles Geometry.
In the following example, a layer of buildings is visualized with the polygons adapted to the Photorealistic 3D Tiles surface.
<!DOCTYPE html>
<html>
<head>
<title>Google 3D tiles example</title>
<script src="https://unpkg.com/deck.gl@latest/dist.min.js"></script>
<style>
body { margin: 0; padding: 0;}
#map { position: absolute; top: 0;bottom: 0;width: 100%;}
#credits { position: absolute; bottom: 0; right: 0; padding: 2px; font-size: 15px; color: white;
text-shadow: -1px 0 black, 0 1px black, 1px 0 black, 0 -1px black;}
</style>
</head>
<body>
<div id="map"></div>
<div id="credits"></div>
<script>
const GOOGLE_API_KEY = YOUR_API_KEY;
const TILESET_URL = `https://tile.googleapis.com/v1/3dtiles/root.json`;
const BUILDINGS_URL = 'https://raw.githubusercontent.com/visgl/deck.gl-data/master/examples/google-3d-tiles/buildings.geojson'
const creditsElement = document.getElementById('credits');
const deckgl = new deck.DeckGL({
container: 'map',
initialViewState: {
latitude: 50.0890,
longitude: 14.4196,
zoom: 16,
bearing: 90,
pitch: 60,
height: 200
},
controller: true,
layers: [
new deck.Tile3DLayer({
id: 'google-3d-tiles',
data: TILESET_URL,
loadOptions: {
fetch: {
headers: {
'X-GOOG-API-KEY': GOOGLE_API_KEY
}
}
},
onTilesetLoad: tileset3d => {
tileset3d.options.onTraversalComplete = selectedTiles => {
const credits = new Set();
selectedTiles.forEach(tile => {
const {copyright} = tile.content.gltf.asset;
copyright.split(';').forEach(credits.add, credits);
creditsElement.innerHTML = [...credits].join('; ');
});
return selectedTiles;
}
},
operation: 'terrain+draw'
}),
new deck.GeoJsonLayer({
id: 'buildings',
// This dataset is created by CARTO, using other Open Datasets available. More info at: https://3dtiles.carto.com/#about.
data: 'https://raw.githubusercontent.com/visgl/deck.gl-data/master/examples/google-3d-tiles/buildings.geojson',
stroked: false,
filled: true,
getFillColor: ({properties}) => {
const {tpp} = properties;
// quantiles break
if (tpp < 0.6249)
return [254, 246, 181]
else if (tpp < 0.6780)
return [255, 194, 133]
else if (tpp < 0.8594)
return [250, 138, 118]
return [225, 83, 131]
},
opacity: 0.2,
extensions: [new deck._TerrainExtension()]
})
]
});
</script>
</body>
</html>