Learn how to create and display a map from a web map stored in ArcGIS.
A web map contains the definition of a map, including properties such as the basemap, initial extent, layers, styles, pop-ups, and labels. You can author and save web maps using the Map Viewer or ArcGIS Pro and share them in ArcGIS. Each web map is stored as an item in ArcGIS Online or ArcGIS Enterprise, allowing you to access a web map from a portal using its item ID and display it in your app.
In this tutorial, you use a web map's item ID to display a map of
trails, trailheads and parks in the Santa Monica Mountains
. The web map is hosted in ArcGIS Online.Prerequisites
The following are required for this tutorial:
- An ArcGIS account to access your API keys. If you don't have an account, sign up for free.
- Your system meets the system requirements.
Steps
Open the Xcode project
-
To start the tutorial, complete the Display a map tutorial or download and unzip the solution.
-
Open the
.xcodeproj
file in Xcode. -
If you downloaded the solution project, set your API key.
An API Key enables access to services, web maps, and web scenes hosted in ArcGIS Online.
-
Go to your developer dashboard to get your API key. For these tutorials, use your default API key. It is scoped to include all of the services demonstrated in the tutorials.
- In Xcode, in the Project Navigator, click AppDelegate.swift.
- In the editor, set the
APIKey
property on theAGSArcGISRuntime
with your API key.Environment
AppDelegate.swiftUse dark colors for code blocks func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool { // Note: it is not best practice to store API keys in source code. // The API key is referenced here for the convenience of this tutorial. AGSArcGISRuntimeEnvironment.apiKey = "YOUR_API_KEY" return true }
-
Get the web map item ID
You can use ArcGIS tools to create and view web maps. Use the Map Viewer to identify the web map item ID. This item ID will be used later in the tutorial.
- Go to the LA Trails and Parks web map
in the Map Viewer in ArcGIS Online. This web map displays
trails, trailheads and parks in the Santa Monica Mountains
. - Make a note of the item ID at the end of the browser's URL. The item ID should be
41281c51f9de45edaf1c8ed44bb10e30
Display the web map
You can create a map from a web map using the web map's item ID. Use the AGSPortal
class to access the web map, and the AGSMap
class to create and display a map from it.
-
In Xcode, in the Project Navigator, click ViewController.swift.
-
In the editor, modify the
setup
function to create anMap() AGSPortal
for the web map. To do this, provide the web map's item ID and anItem AGSPortal
referencing ArcGIS Online.ViewController.swiftUse dark colors for code blocks Change line Change line Change line private func setupMap() { let portal = AGSPortal.arcGISOnline(withLoginRequired: false) let itemID = "41281c51f9de45edaf1c8ed44bb10e30" let portalItem = AGSPortalItem(portal: portal, itemID: itemID) }
The
AGSPortal
object is created using a convenience function that points to ArcGIS Online. This is the equivalent of:Use dark colors for code blocks Copy AGSPortal(url: URL(string: "https://www.arcgis.com")!, loginRequired: false)
-
Create an
AGSMap
using theAGSPortal
. To display the map, set theItem map
'sView map
property to this newAGSMap
.ViewController.swiftUse dark colors for code blocks Add line. Add line. private func setupMap() { let portal = AGSPortal.arcGISOnline(withLoginRequired: false) let itemID = "41281c51f9de45edaf1c8ed44bb10e30" let portalItem = AGSPortalItem(portal: portal, itemID: itemID) let map = AGSMap(item: portalItem) mapView.map = map }
-
Press Command + R to run the app.
If you are using the Xcode simulator your system must meet these minimum requirements: macOS Big Sur 11.3, Xcode 13, iOS 13. If you are using a physical device, then refer to the system requirements.
You should see a map of
trails, trailheads and parks in the Santa Monica Mountains
. Pinch, drag, and double-tap the map view to explore the map.What's next?
Learn how to use additional API features, ArcGIS location services, and ArcGIS tools in these tutorials: