Display a web map
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.
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 PortalItem
class to access the web map and the Map
class to create and display a map from it.
In Xcode, in the Project Navigator, click ContentView.swift.
The variable
map
is not required to be a computed property for this tutorial. Replace it with aMap
initializer. You'll update this in the next step.ContentView.swiftUse dark colors for code blocks Change line Change line Change line Initialize the map with a
PortalItem
for the web map. To do this, provide aPortal
referencing ArcGIS Online and the web map's item ID.ContentView.swiftUse dark colors for code blocks Change line Change line Change line Change line Press <Command+R> to run the app.
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: