Create a raster layer from a raster image service.
Use case
Accessing a raster image from an online service can be useful for analysing the most up-to-date data available for an area. For example, retrieving recent results of bathymetry surveys within a shipping channel monitored for its sediment build-up would allow planners to assess dredging needs.
How to use the sample
Simply launch the sample to see a raster from an image service being used on a map.
How it works
Create an ImageServiceRaster using the service's URL.
Create a RasterLayer from the image service raster.
Add the raster layer the the map.
Relevant API
ImageServiceRaster
RasterLayer
About the data
This sample uses a NOAA raster image service. The service computes a hillshade image from the depth (in meters) of U.S. coastal waters.
Tags
image service, raster
Sample Code
RasterLayerService.qml
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// [WriteFile Name=RasterLayerService, 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 QtQuick.Controls
import Esri.ArcGISRuntime
Rectangle {
id: rootRectangleclip: truewidth: 800height: 600MapView {
id: mapViewanchors.fill: parentComponent.onCompleted: {
// Set the focus on MapView to initially enable keyboard navigation forceActiveFocus();
}
Map {
// create a basemap from a tiled layer and add to the mapBasemap {
ArcGISTiledLayer {
url: "https://services.arcgisonline.com/arcgis/rest/services/Canvas/World_Dark_Gray_Base/MapServer" }
}
// create and add a raster layer to the mapRasterLayer {
//! [ImageServiceRaster Create an image service raster]// create the raster layer from an image service rasterImageServiceRaster {
id: imageServiceRasterurl: "https://gis.ngdc.noaa.gov/arcgis/rest/services/bag_hillshades_subsets/ImageServer"// zoom to the center of the raster once it's loadedonLoadStatusChanged: {
if (loadStatus === Enums.LoadStatusLoaded) {
const scale = 100000;
mapView.setViewpointCenterAndScale(ArcGISRuntimeEnvironment.createObject("Point", {x: -13643095.660131, y: 4550009.846004}), scale);
}
}
}
//! [ImageServiceRaster Create an image service raster] }
}
}
}