Map spatial reference

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Specify a map's spatial reference.

Image of map spatial reference

Use case

Choosing the correct spatial reference is important for ensuring accurate projection of data points to a map.

How to use the sample

Pan and zoom around the map. Observe how the map is displayed using the World Bonne spatial reference.

How it works

  1. Instantiate a Map object using a spatial reference e.g. ArcGISMap(SpatialReference.Create(54024)).
  2. Instantiate a Basemap object using an ArcGISMapImageLayer object.
  3. Set the base map to the map.
  4. Set the map to a MapView object.

The ArcGIS map image layer will now use the spatial reference set to the ArcGIS map (World Bonne (WKID: 54024)) and not it's default spatial reference.

Relevant API

  • ArcGISMapImageLayer
  • Basemap
  • Map
  • MapView
  • SpatialReference

Additional information

Operational layers will automatically project to this spatial reference when possible.

Tags

project, WKID

Sample Code

SetMapSpatialReference.xamlSetMapSpatialReference.xaml.cs
          
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<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:esriUI="clr-namespace:Esri.ArcGISRuntime.Xamarin.Forms;assembly=Esri.ArcGISRuntime.Xamarin.Forms"
             xmlns:mapping="clr-namespace:Esri.ArcGISRuntime.Mapping;assembly=Esri.ArcGISRuntime"
             x:Class="ArcGISRuntime.Samples.SetMapSpatialReference.SetMapSpatialReference">
  <Grid>
    <esriUI:MapView x:Name="MyMapView"/>
  </Grid>
</ContentPage>

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