Set map spatial reference

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Sample viewer app

Specify a map's spatial reference.

screenshot

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

Create a Map object using a spatial reference.
Create a Basemap object using an ArcGISMapImageLayer object.
Set the base map to the map.
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.

Sample Code

SetMapSpatialReference.qml
Use dark colors for code blocksCopy
// [WriteFile Name=SetMapSpatialReference, Category=Maps]
// [Legal]
// Copyright 2016 Esri.

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [Legal]

import QtQuick 2.6
import Esri.ArcGISRuntime 100.15

Rectangle {
    width: 800
    height: 600

    MapView {
        anchors.fill: parent
        wrapAroundMode: Enums.WrapAroundModeDisabled

        Component.onCompleted: {
            // Set the focus on MapView to initially enable keyboard navigation
            forceActiveFocus();
        }

        Map {
            id: map
            // Specify the SpatialReference
            spatialReference: SpatialReference { wkid:54024 }
        }
    }

    Basemap {
        id: basemap
        ArcGISMapImageLayer {
            url: "https://sampleserver6.arcgisonline.com/arcgis/rest/services/SampleWorldCities/MapServer"
        }
    }

    Component.onCompleted: {
        map.basemap = basemap;
    }
}