Specify a map's 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
- Create a
Mapobject using a spatial reference. - Create a
Basemapobject using anArcGISMapImageLayerobject. - Set the base map to the map.
- Set the map to a
MapViewobject.
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.qml
// [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
import Esri.ArcGISRuntime
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;
}
}