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Showing content from https://developers.arcgis.com/qt/cpp/api-reference/esri-arcgisruntime-imageserviceraster.html below:

ImageServiceRaster Class | ArcGIS Maps SDK for Qt

ImageServiceRaster

class Esri::ArcGISRuntime::ImageServiceRaster

Raster data that is retrieved from an ArcGIS Image Service. More...

Public Functions Reimplemented Public Functions (deprecated) virtual Esri::ArcGISRuntime::Credential * credential() const override (deprecated) virtual Esri::ArcGISRuntime::RequestConfiguration requestConfiguration() const override (deprecated) virtual void setRequestConfiguration(const Esri::ArcGISRuntime::RequestConfiguration &requestConfiguration) override virtual QUrl url() const override Detailed Description

An ArcGIS image service provides access to raster data through a web service. A single raster dataset or a mosaic dataset which contains a collection of raster datasets can be served as one image service. The mosaic dataset can dynamically process and mosaic the images on the fly. An image service supports accessing both the mosaicked image and its catalog, as well as individual rasters in the catalog. An image service raster allows you to display raster data from image services using a RasterLayer. It also allows you to apply service-defined or client-defined rendering rules by setting RenderingRule on it. You can pass an image service raster as a raster input to a RasterFunction to work with local raster functions.

Create an ImageServiceRaster:

// create an image service raster
ImageServiceRaster* imageServiceRaster = new ImageServiceRaster(
      QUrl(QStringLiteral("https://gis.ngdc.noaa.gov/arcgis/rest/services/bag_hillshades_subsets/ImageServer")), this);
// zoom to the center of the raster once it's loaded
connect(imageServiceRaster, &ImageServiceRaster::doneLoading, this, [this]()
{
  constexpr double scale = 200000.;
  Viewpoint vpCenter = Viewpoint(Point(-13643095.660131, 4550009.846004, SpatialReference::webMercator()), scale);
  m_mapView->setViewpointAsync(vpCenter);
});

// create a raster layer using the image service raster
m_rasterLayer = new RasterLayer(imageServiceRaster, this);
// add the raster layer to the map's operational layers
m_map->operationalLayers()->append(m_rasterLayer);

Relevant samples:

Apply mosaic rule to rasters: Apply mosaic rule to a mosaic dataset of rasters.
Raster function (service): Load a raster from a service, then apply a function to it.
Raster layer (service): Create a raster layer from a raster image service.
Raster rendering rule: Display a raster on a map and apply different rendering rules to that raster.

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