ArcGIS map image layer (URL)

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C++

QML

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Sample viewer app

Display a layer from an ArcGIS map image layer service.

screenshot

Use case

Map image layers are also referred to as dynamic map services. These services generate images dynamically on the server and send the resulting image to the requesting client. This is useful when rendering complex cartography or large amounts of data in a connected environment, as the client simply displays the image that the server returns. This can result in more accurate and faster-performing layers.

How to use the sample

Run the sample and view the map image layer. As you navigate the map, the layer issues image requests for the new map extent. The resulting images are rendered on the screen.

How it works

Create an instance of ArcGISMap.
Create an ArcGISMapImageLayer with the URL to a map image service.
Create a Basemap with the map image layer.
Add the basemap to the Map.

Relevant API

ArcGISMapImageLayer

Sample Code

ArcGISMapImageLayerUrl.cpp

ArcGISMapImageLayerUrl.h

ArcGISMapImageLayerUrl.qml

Use dark colors for code blocksCopy
// [WriteFile Name=ArcGISMapImageLayerUrl, 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]

#ifdef PCH_BUILD
#include "pch.hpp"
#endif // PCH_BUILD

#include "ArcGISMapImageLayerUrl.h"

#include "Map.h"
#include "MapQuickView.h"
#include "Basemap.h"
#include "ArcGISMapImageLayer.h"
#include <QUrl>

using namespace Esri::ArcGISRuntime;

ArcGISMapImageLayerUrl::ArcGISMapImageLayerUrl(QQuickItem* parent) :
  QQuickItem(parent)
{
}

ArcGISMapImageLayerUrl::~ArcGISMapImageLayerUrl() = default;

void ArcGISMapImageLayerUrl::init()
{
  qmlRegisterType<MapQuickView>("Esri.Samples", 1, 0, "MapView");
  qmlRegisterType<ArcGISMapImageLayerUrl>("Esri.Samples", 1, 0, "ArcGISMapImageLayerUrlSample");
}

void ArcGISMapImageLayerUrl::componentComplete()
{
  QQuickItem::componentComplete();

  // find QML MapView component
  m_mapView = findChild<MapQuickView*>("mapView");

  // create a new map image layer
  ArcGISMapImageLayer* mapImageLayer = new ArcGISMapImageLayer(QUrl("https://sampleserver5.arcgisonline.com/arcgis/rest/services/Elevation/WorldElevations/MapServer"), this);

  // create a new basemap from the layer
  Basemap* basemap = new Basemap(mapImageLayer, this);

  // create a new map instance
  m_map = new Map(basemap, this);

  // set map on the map view
  m_mapView->setMap(m_map);
}