Learn how to find an address or place.
Geocoding is the process of converting address or place text to a location. The geocoding service provides address and place geocoding and reverse geocoding.
In this tutorial, you use ArcGIS REST JS to access the geocoding service. You use a simple input control to accept text and a button to execute a search for an address or place. When an address or place is located, a pop-up will appear with the name, location, and address, and the view will pan to it.
Prerequisites
An ArcGIS Location Platform or ArcGIS Online account.
Steps
Get the starter app
Select a type of authentication below and follow the steps to create a new application.
Set up authentication
Create developer credentials in your portal for the type of authentication you selected.
Set developer credentials
Use the API key or OAuth developer credentials created in the previous step in your application.
Get a Cesium ion access token
All Cesium applications must use an access token provided through Cesium ion. This token allows you to access assets such as Cesium World Terrain in your application.
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Go to your Cesium ion dashboard to generate an access token. Copy the key to your clipboard.
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Create a
cesium
variable and replaceAccess Token YOUR
with the access token you copied from the Cesium ion dashboard._CESIUM _ACCESS _TOKEN Use dark colors for code blocks <script> /* Use for API key authentication */ const accessToken = "YOUR_ACCESS_TOKEN"; // or /* Use for user authentication */ // const session = await arcgisRest.ArcGISIdentityManager.beginOAuth2({ // clientId: "YOUR_CLIENT_ID", // Your client ID from OAuth credentials // redirectUri: "YOUR_REDIRECT_URL", // The redirect URL registered in your OAuth credentials // portal: "YOUR_PORTAL_URL" // Your portal URL // }) // const accessToken = session.token; Cesium.ArcGisMapService.defaultAccessToken = accessToken; const cesiumAccessToken = "YOUR_CESIUM_ACCESS_TOKEN"; </script>
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Configure
Cesium.
with the Cesium access token to validate the application.Ion.default Access Token Use dark colors for code blocks <script> /* Use for API key authentication */ const accessToken = "YOUR_ACCESS_TOKEN"; // or /* Use for user authentication */ // const session = await arcgisRest.ArcGISIdentityManager.beginOAuth2({ // clientId: "YOUR_CLIENT_ID", // Your client ID from OAuth credentials // redirectUri: "YOUR_REDIRECT_URL", // The redirect URL registered in your OAuth credentials // portal: "YOUR_PORTAL_URL" // Your portal URL // }) // const accessToken = session.token; Cesium.ArcGisMapService.defaultAccessToken = accessToken; const cesiumAccessToken = "YOUR_CESIUM_ACCESS_TOKEN"; Cesium.Ion.defaultAccessToken = cesiumAccessToken; </script>
Add references to ArcGIS REST JS
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In the
<head
element, reference the> geocoding
andrequest
packages from ArcGIS REST JS.Use dark colors for code blocks <script src="https://cesium.com/downloads/cesiumjs/releases/1.121/Build/Cesium/Cesium.js"></script> <link href="https://cesium.com/downloads/cesiumjs/releases/1.121/Build/Cesium/Widgets/widgets.css" rel="stylesheet"> <script src="https://unpkg.com/@esri/arcgis-rest-request@4/dist/bundled/request.umd.js"></script> <script src="https://unpkg.com/@esri/arcgis-rest-geocoding@4/dist/bundled/geocoding.umd.js"></script>
Update the scene
CesiumJS supports both 3D models and geocoding. Update the scene to display 3D buildings so that you can search for them with the geocoding service.
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Update the scene view to center on location
[-122.4117, 37.769, 5000]
in San Francisco, CA.Use dark colors for code blocks viewer.camera.setView({ destination: Cesium.Cartesian3.fromDegrees(-122.4117, 37.769, 5000), orientation: { pitch: Cesium.Math.toRadians(-70) } })
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Initialize a terrain provider called
geoid
that references the Earth Gravitational Model EGM2008. This provider will allow for geoid conversion between the gravity-based 3D object layer and the ellipsoidal-based Cesium World Terrain.Service Use dark colors for code blocks const geoidService = await Cesium.ArcGISTiledElevationTerrainProvider.fromUrl("https://tiles.arcgis.com/tiles/GVgbJbqm8hXASVYi/arcgis/rest/services/EGM2008/ImageServer");
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Add the data attribution for the elevation layer source.
- Go to the EGM2008 item.
- Scroll down to the Credits (Attribution) section and copy its value.
- Create an
attribution
property and paste the attribution value from the item.Use dark colors for code blocks const geoidService = await Cesium.ArcGISTiledElevationTerrainProvider.fromUrl("https://tiles.arcgis.com/tiles/GVgbJbqm8hXASVYi/arcgis/rest/services/EGM2008/ImageServer"); // Attribution text retrieved from https://arcgis.com/home/item.html?id=d798c71512404bbb9c1551b827bf5467 viewer.creditDisplay.addStaticCredit(new Cesium.Credit("National Geospatial-Intelligence Agency (NGA)", false));
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Add the San Francisco 3D Buildings scene layer to visualize the city of San Francisco.
Use dark colors for code blocks viewer.camera.setView({ destination: Cesium.Cartesian3.fromDegrees(-122.4117, 37.769, 5000), orientation: { pitch: Cesium.Math.toRadians(-70) } }) // Add Esri attribution // Learn more in https://esriurl.com/attribution const poweredByEsri = new Cesium.Credit("Powered by <a href='https://www.esri.com/en-us/home' target='_blank'>Esri</a>", true) viewer.creditDisplay.addStaticCredit(poweredByEsri); const geoidService = await Cesium.ArcGISTiledElevationTerrainProvider.fromUrl("https://tiles.arcgis.com/tiles/GVgbJbqm8hXASVYi/arcgis/rest/services/EGM2008/ImageServer"); // Attribution text retrieved from https://arcgis.com/home/item.html?id=d798c71512404bbb9c1551b827bf5467 viewer.creditDisplay.addStaticCredit(new Cesium.Credit("National Geospatial-Intelligence Agency (NGA)", false)); const i3sProvider = await Cesium.I3SDataProvider.fromUrl("https://tiles.arcgis.com/tiles/z2tnIkrLQ2BRzr6P/arcgis/rest/services/SanFrancisco_Bldgs/SceneServer", { geoidTiledTerrainProvider: geoidService }); viewer.scene.primitives.add(i3sProvider);
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Add the data attribution for the scene layer source.
- Go to the San Francisco 3D Objects item.
- Scroll down to the Credits (Attribution) section and copy its value.
- Create an
attribution
property and paste the attribution value from the item.Use dark colors for code blocks viewer.camera.setView({ destination: Cesium.Cartesian3.fromDegrees(-122.4117, 37.769, 5000), orientation: { pitch: Cesium.Math.toRadians(-70) } }) // Add Esri attribution // Learn more in https://esriurl.com/attribution const poweredByEsri = new Cesium.Credit("Powered by <a href='https://www.esri.com/en-us/home' target='_blank'>Esri</a>", true) viewer.creditDisplay.addStaticCredit(poweredByEsri); const geoidService = await Cesium.ArcGISTiledElevationTerrainProvider.fromUrl("https://tiles.arcgis.com/tiles/GVgbJbqm8hXASVYi/arcgis/rest/services/EGM2008/ImageServer"); // Attribution text retrieved from https://arcgis.com/home/item.html?id=d798c71512404bbb9c1551b827bf5467 viewer.creditDisplay.addStaticCredit(new Cesium.Credit("National Geospatial-Intelligence Agency (NGA)", false)); const i3sProvider = await Cesium.I3SDataProvider.fromUrl("https://tiles.arcgis.com/tiles/z2tnIkrLQ2BRzr6P/arcgis/rest/services/SanFrancisco_Bldgs/SceneServer", { geoidTiledTerrainProvider: geoidService }); // Attribution text retrieved from https://www.arcgis.com/home/item.html?id=d3344ba99c3f4efaa909ccfbcc052ed5 viewer.creditDisplay.addStaticCredit(new Cesium.Credit("Precision Light Works (PLW)", false)); viewer.scene.primitives.add(i3sProvider);
Create geocoder controls
To trigger the geocode, users will type an address then click a button. Create an HTML <input
control to accept user input and a <button
control to initiate the query.
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In the
<body
, add a> <div
containing a text input element and a button element.> Use dark colors for code blocks <body> <div id="cesiumContainer"></div> <div class="search"> <input id="geocode-input" type="text" placeholder="Enter an address or place e.g. 1 York St" size="50" /> <button id="geocode-button">Geocode</button> </div> <script type="module">
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In the
<style
section, style the controls so that they appear in the top left corner of the app.> Use dark colors for code blocks <style> html, body, #cesiumContainer { width: 100%; height: 100%; padding: 0px; margin: 0px; } .search { position: absolute; top: 8px; left: 8px; } #geocode-input, #geocode-button { font-size: 16px; margin: 0 2px 0 0; padding: 4px 8px; } #geocode-input { width: 300px; } </style>
Call the geocoding service
When a user clicks the Geocode button, call arcgis
to geocode the user's search query.
arcgis
uses the geocoding service to perform a find
operation. To learn more about the operation, go to the REST API documentation.
-
Create a new
arcgis
using your access token to authenticate requests to the geocoding service.Rest. Api Key Manager Use dark colors for code blocks /* Use for API key authentication */ const accessToken = "YOUR_ACCESS_TOKEN"; // or /* Use for user authentication */ // const session = await arcgisRest.ArcGISIdentityManager.beginOAuth2({ // clientId: "YOUR_CLIENT_ID", // Your client ID from OAuth credentials // redirectUri: "YOUR_REDIRECT_URL", // The redirect URL registered in your OAuth credentials // portal: "https://www.arcgis.com/sharing/rest" // Your portal URL // }) // const accessToken = session.token; Cesium.ArcGisMapService.defaultAccessToken = accessToken; const authentication = arcgisRest.ApiKeyManager.fromKey(accessToken);
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Add an event listener to the geocoding button. When the button is clicked, call a new function called
find
with the user's input as a parameter.Address Use dark colors for code blocks const geoidService = await Cesium.ArcGISTiledElevationTerrainProvider.fromUrl("https://tiles.arcgis.com/tiles/GVgbJbqm8hXASVYi/arcgis/rest/services/EGM2008/ImageServer"); // Attribution text retrieved from https://arcgis.com/home/item.html?id=d798c71512404bbb9c1551b827bf5467 viewer.creditDisplay.addStaticCredit(new Cesium.Credit("National Geospatial-Intelligence Agency (NGA)", false)); const i3sProvider = await Cesium.I3SDataProvider.fromUrl("https://tiles.arcgis.com/tiles/z2tnIkrLQ2BRzr6P/arcgis/rest/services/SanFrancisco_Bldgs/SceneServer", { geoidTiledTerrainProvider: geoidService }); // Attribution text retrieved from https://www.arcgis.com/home/item.html?id=d3344ba99c3f4efaa909ccfbcc052ed5 viewer.creditDisplay.addStaticCredit(new Cesium.Credit("Precision Light Works (PLW)", false)); viewer.scene.primitives.add(i3sProvider); function findAddress(query) { } document.getElementById("geocode-button").addEventListener("click", () => { viewer.entities.removeAll(); const query = document.getElementById("geocode-input").value; findAddress(query); });
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In the
find
function, callAddress arcgis
and pass theRest.geocode authentication
object. Set thesingle
parameter to the search query. Set theLine location
parameter to the camera's current position to prioritize search results near the current extent.Use dark colors for code blocks function findAddress(query) { const cameraPos = Cesium.Cartographic.fromCartesian(viewer.camera.position); const center = [Cesium.Math.toDegrees(cameraPos.longitude), Cesium.Math.toDegrees(cameraPos.latitude)] arcgisRest .geocode({ singleLine: query, authentication, params: { outFields: "*", location: center.join(",") } }) }
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Access the service response to obtain query results. Alert the user if no results are returned.
Use dark colors for code blocks arcgisRest .geocode({ singleLine: query, authentication, params: { outFields: "*", location: center.join(",") } }) .then((response) => { const result = response.candidates[0]; if (!result === 0) { alert("That query didn't match any geocoding results."); return; } })
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Check for issues in accessing the geocoding service (such as a network disruption or authentication problems) and alert the user.
Use dark colors for code blocks arcgisRest .geocode({ singleLine: query, authentication, params: { outFields: "*", location: center.join(",") } }) .then((response) => { const result = response.candidates[0]; if (!result === 0) { alert("That query didn't match any geocoding results."); return; } }) .catch((error) => { alert("There was a problem using the geocoder. See the console for details."); console.error(error); });
Display results
If the query is successful, the candidates
property of the response will contain a list of one of more address candidates. To display the top candidate, create a new entity and add it to your scene.
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Add a new
Entity
to the viewer at the coordinates of the result. Set thename
anddescription
of the entity to display information about the result candidate.Use dark colors for code blocks .then((response) => { const result = response.candidates[0]; if (!result === 0) { alert("That query didn't match any geocoding results."); return; } const location = Cesium.Cartesian3.fromDegrees(result.location.x, result.location.y); const candidate = viewer.entities.add({ name: 'Search result', description: `${result.address}`, position: location, }) })
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Set the
billboard
property of your entity to display a pin on the map. Use aPin
to set theBuilder image
property of the pin.Use dark colors for code blocks const pinBuilder = new Cesium.PinBuilder() const location = Cesium.Cartesian3.fromDegrees(result.location.x, result.location.y); const candidate = viewer.entities.add({ name: 'Search result', description: `${result.address}`, position: location, billboard: { verticalOrigin: Cesium.VerticalOrigin.BOTTOM, heightReference: Cesium.HeightReference.CLAMP_TO_GROUND, image: pinBuilder.fromColor(Cesium.Color.fromCssColorString('#5491f5'), 48).toDataURL() } })
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Select and track the result entity in order to display a pop-up and center the camera on the result.
Use dark colors for code blocks billboard: { verticalOrigin: Cesium.VerticalOrigin.BOTTOM, heightReference: Cesium.HeightReference.CLAMP_TO_GROUND, image: pinBuilder.fromColor(Cesium.Color.fromCssColorString('#5491f5'), 48).toDataURL() } }) viewer.selectedEntity = candidate; viewer.trackedEntity = candidate;
Run the app
Run the app.
In the input box, type "Ferry building San Francisco" and then click the Geocode button to find its location. If a location is found, the map will zoom to it and display a pop-up with the address.
What's next?
Learn how to use additional ArcGIS location services in these tutorials: