View in QML C++ View on GitHub Sample viewer app
Create and use a raster layer made from a local raster file.
Use case
Rasters can be digital aerial photographs, imagery from satellites, digital pictures, or even scanned maps. An end-user will frequently need to import raster files acquired through various data-collection methods into their map to view and analyze the data.
How to use the sample
The sample will load with a map showing a basemap and a loaded raster layer. Tap on "Add Raster" to browse for a new raster file. On desktop platforms the sample also allows you to drag and drop supported raster files to load.
How it works
To add a RasterLayer
as an operational layer from a local raster file:
Create a Map
with a Basemap
. Once this has been loaded, raster layers will be re-projected on the fly to match the map.
Create a Raster
from a raster file.
Create a RasterLayer
from the raster.
Add it as an operational layer with map.operationalLayers.append(rasterLayer)
.
Relevant API
Offline Data
To set up the sample's offline data, see the Use offline data in the samples section of the Qt Samples repository overview.
Link
Local Location
Shasta.tif raster
<userhome>
/ArcGIS/Runtime/Data/raster/Shasta.tif
See the topic What is raster data? in the ArcMap documentation for more information about raster images.
data, image, import, layer, raster, visualization
Sample CodeRasterLayerFile.qml RasterLayerFile.qml RasterLoader.qml
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// [WriteFile Name=RasterLayerFile, Category=Layers]
// [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 QtQuick.Controls
import Esri.ArcGISRuntime
import Esri.ArcGISExtras
Rectangle {
id: rootRectangle
clip : true
anchors.fill : parent
readonly property url dataPath : {
Qt.platform.os === "ios" ?
System.writableLocationUrl(System.StandardPathsDocumentsLocation) + "/ArcGIS/Runtime/Data/raster/" :
System.writableLocationUrl(System.StandardPathsHomeLocation) + "/ArcGIS/Runtime/Data/raster/"
}
readonly property var supportedFormats : [ "img" , "I12" , "dt0" , "dt1" , "dt2" , "tc2" , "geotiff" , "tif" , "tiff" , "hr1" , "jpg" , "jpeg" , "jp2" , "ntf" , "png" , "i21" , "ovr" ]
property var rasterLayer : null
MapView {
id: mapView
anchors.fill : parent
Component.onCompleted : {
// Set the focus on MapView to initially enable keyboard navigation
forceActiveFocus();
}
Map {
id: map
Basemap {
initStyle : Enums.BasemapStyleArcGISImageryStandard
}
//! [RasterLayerFile qml new raster layer]
RasterLayer {
Raster {
path : dataPath + "Shasta.tif"
}
// ...
//! [RasterLayerFile qml new raster layer]
onLoadStatusChanged : {
if (loadStatus !== Enums.LoadStatusLoaded)
return ;
mapView.setViewpointCenterAndScale(fullExtent.center, 80000 );
}
}
}
}
Rectangle {
visible : addButton.visible
anchors.centerIn : addButton
radius : 8
height : addButton.height + ( 16 )
width : addButton.width + ( 16 )
color : "lightgrey"
border.color : "darkgrey"
border.width : 2
opacity : 0.75
}
Button {
id: addButton
anchors {
bottom : parent .bottom
horizontalCenter : parent .horizontalCenter
margins : 32
}
text : "Add Raster"
onClicked : loader.open();
}
RasterLoader {
id: loader
anchors.fill : rootRectangle
folder : dataPath
supportedExtensions : supportedFormats
onRasterFileChosen : url => {
createAndAddRasterLayer( url );
}
}
function createAndAddRasterLayer ( rasterUrl ) {
const newRaster = ArcGISRuntimeEnvironment.createObject( "Raster" , { path : rasterUrl});
rasterLayer = ArcGISRuntimeEnvironment.createObject( "RasterLayer" , { raster : newRaster});
rasterLayer.loadStatusChanged.connect(zoomToRaster);
map.operationalLayers.clear();
map.operationalLayers.append(rasterLayer);
}
function zoomToRaster ( ) {
if (rasterLayer === null )
return ;
if (rasterLayer.loadStatus !== Enums.LoadStatusLoaded)
return ;
mapView.setViewpointCenterAndScale(rasterLayer.fullExtent.center, 80000 );
}
}