ArcGIS tiled layer (URL)

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C++

QML

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Sample viewer app

Load an ArcGIS tiled layer from a URL.

screenshot

Use case

An ArcGISTiledLayer consumes raster tiles provided by an ArcGIS service or a tile package (.tpk & .tpkx). Dividing a raster into tiles provides the user with relevant tiles and level of detail while panning and zooming, allowing for rapid map visualization and navigation. For example, say you wanted an application with a map containing all museums in your city so that you could share this with tourists. Since only the museums would need to support being identifiable or queryable within the app, all other contextual information required to orient and direct the tourists could be sourced from a single ArcGIS tiled layer, leading to faster performance and minimizing the time to load the map.

How to use the sample

Launch the app to view the "World Topographic Map" tile layer as the basemap.

How it works

Create a ArcGISTiledLayer object from a URL.
Create a Basemap passing in the tiled layer.
Create a Map with the basemap.
Set the map on the MapView.

Relevant API

Map
ArcGISTiledLayer
Basemap
MapView

About the data

The application utilizes the "World Topographic Map" tile layer. This presents a simple yet powerful illustration of adding visualization context to a basemap through the use of an ArcGIS tiled layer.

Additional information

An ArcGISTiledLayer can also be added to the ArcGISMap as a layer, but it's best practice to use as a basemap since its purpose is to provide geographical context. ArcGIS tiled layers do not support reprojection, query, select, identify, or editing.

Sample Code

ArcGISTiledLayerUrl.cpp

ArcGISTiledLayerUrl.h

ArcGISTiledLayerUrl.qml

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// [WriteFile Name=ArcGISTiledLayerUrl, 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 "ArcGISTiledLayerUrl.h"

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

using namespace Esri::ArcGISRuntime;

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

ArcGISTiledLayerUrl::~ArcGISTiledLayerUrl() = default;

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

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

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

  //! [display tiled layer from tiled map service]
  // create a new tiled layer
  ArcGISTiledLayer* tiledLayer = new ArcGISTiledLayer(QUrl("https://services.arcgisonline.com/arcgis/rest/services/World_Topo_Map/MapServer"), this);
  // create a new basemap instance with the tiled layer
  Basemap* basemap = new Basemap(tiledLayer, this);
  // create a new map instance
  m_map = new Map(basemap, this);
  // set map on the map view
  m_mapView->setMap(m_map);
  //! [display tiled layer from tiled map service]
}