WMTS layer

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Sample viewer app

Display a layer from a Web Map Tile Service.

screenshot

Use case

WMTS services can have several layers. You can use Runtime to explore the layers available from a service. This would commonly be used to enable a browsing experience where users can choose which layers they want to display at run time.

How to use the sample

The layer will be displayed automatically. Use the buttons to choose a different method of loading the layer.

How it works

To display a WMTS layer directly from a URL:

  1. Create a WmtsService object using the URL of the WMTS service.
  2. Create a WmtsLayer object with the ID of the layer to display.

To explore layers from a WMTS service:

  1. Create a WmtsService object using the URL of the WMTS service.
  2. After loading the WMTS service, get the list of WmtsLayerInfo objects from the service info of the WMTS service.
  3. Use one of the layer infos to create the WMTS layer.
  4. Create a basemap with the WMTS layer and set it to the map.

Relevant API

  • WmtsLayer
  • WmtsLayerInfo
  • WmtsService
  • WmtsServiceInfo

About the data

The map visualizes world time zones.

Tags

layer, OGC, raster, tiled, web map tile service

Sample Code

WMTS_Layer.cppWMTS_Layer.cppWMTS_Layer.hWMTS_Layer.qml
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// [WriteFile Name=WMTS_Layer, 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]

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

#include "WMTS_Layer.h"

#include "Map.h"
#include "MapQuickView.h"
#include "WmtsLayer.h"
#include "WmtsService.h"
#include "WmtsServiceInfo.h"
#include "WmtsLayerInfo.h"
#include "Basemap.h"

using namespace Esri::ArcGISRuntime;

WMTS_Layer::WMTS_Layer(QQuickItem* parent /* = nullptr */):
  QQuickItem(parent)
{
}

void WMTS_Layer::init()
{
  // Register the map view for QML
  qmlRegisterType<MapQuickView>("Esri.Samples", 1, 0, "MapView");
  qmlRegisterType<WMTS_Layer>("Esri.Samples", 1, 0, "WMTS_LayerSample");
}

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

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

  // create the WMTS layer
  createWmtsLayer();
}

void WMTS_Layer::createWmtsLayer()
{
  // create the service
  m_service = new WmtsService(m_wmtsServiceUrl, this);

  // connect to the doneLoading signal of the service
  connect(m_service, &WmtsService::doneLoading, this, [this](Error loadError)
  {
    if (!loadError.isEmpty())
    {
      qDebug() << "Error:" << loadError.message();
      return;
    }

    // get the layer info list
    WmtsServiceInfo serviceInfo = m_service->serviceInfo();
    QList<WmtsLayerInfo> layerInfos = serviceInfo.layerInfos();
    // get the first layer ID from the list
    QString layerId = layerInfos.at(0).wmtsLayerId();
    // create the WMTS layer
    WmtsLayer* wmtsLayer = new WmtsLayer(m_wmtsServiceUrl, layerId, this);
    // create a basemap from the layer
    Basemap* basemap = new Basemap(wmtsLayer, this);
    // create a map
    Map* map = new Map(basemap, this);
    // set the map on the mapview
    m_mapView->setMap(map);
  });

  // load the service
  m_service->load();
}

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