GeoPackages are designed to simplify file management and transfer. They can store raster files (as well as other types of data). An end-user wishing to transfer rasters from ArcGIS Pro or between ArcGIS Maps SDK apps, might need to import raster files from GeoPackages into their map to view and analyze the data.
How to use the sample
When the sample starts, a raster will be loaded from a GeoPackage and displayed in the map view.
How it works
Create and load a GeoPackage, specifying the path to the local .gpkg file.
When it is done loading, get the GeoPackageRasters from the geopackage.
Construct a RasterLayer with the geopackage raster you want to use.
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// [WriteFile Name=RasterLayerGeoPackage, Category=Layers]// [Legal]// Copyright 2017 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
import Esri.ArcGISExtras
Rectangle {
id: rootRectangleclip: truewidth: 800height: 600 readonly property url dataPath: {
Qt.platform.os === "ios" ?
System.writableLocationUrl(System.StandardPathsDocumentsLocation) + "/ArcGIS/Runtime/Data/gpkg/" :
System.writableLocationUrl(System.StandardPathsHomeLocation) + "/ArcGIS/Runtime/Data/gpkg/" }
MapView {
id: mapViewanchors.fill: parentComponent.onCompleted: {
// Set the focus on MapView to initially enable keyboard navigation forceActiveFocus();
}
Map {
id: mapBasemap {
initStyle: Enums.BasemapStyleArcGISLightGray
}
// Load the GeoPackage once the Map loadsonLoadStatusChanged: {
if (loadStatus === Enums.LoadStatusLoaded)
gpkg.load();
}
// set an initial viewpointViewpointCenter {
Point {
y: 39.7294x: -104.8319spatialReference: SpatialReference { wkid: 4326 }
}
targetScale: 200000 }
}
}
// Declare a GeoPackageGeoPackage {
id: gpkgpath: dataPath + "AuroraCO.gpkg"// Wait for the GeoPackage to load successfullyonLoadStatusChanged: {
if (loadStatus !== Enums.LoadStatusLoaded)
return;
if (!gpkg.geoPackageRasters.length > 0)
return;
// Get the first rasterconst gpkgRaster = gpkg.geoPackageRasters[0];
// Create a RasterLayer with the rasterconst rasterLayer = ArcGISRuntimeEnvironment.createObject("RasterLayer", {raster: gpkgRaster});
// Append the layer to the map map.operationalLayers.append(rasterLayer);
}
}
}