Feature layer (feature service)

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Sample viewer app

Show features from an online feature service.

screenshot

Use case

Feature services are useful for sharing vector GIS data with clients so that individual features can be queried, displayed, and edited.

How to use the sample

Run the sample and view the feature service as an operational layer on top of the basemap. Zoom and pan around the map to see the features in greater detail.

How it works

  1. Create a ServiceFeatureTable from a URL.
  2. Create a feature layer from the service feature table.
  3. Add the feature layer to your Map using Map::operationalLayers()::append(FeatureLayer).

Relevant API

  • Basemap
  • FeatureLayer
  • Map
  • MapView
  • ServiceFeatureTable

Tags

feature table, layer, layers, service

Sample Code

FeatureLayerFeatureService.cppFeatureLayerFeatureService.cppFeatureLayerFeatureService.hFeatureLayerFeatureService.qml
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// [WriteFile Name=FeatureLayerFeatureService, Category=Features]
// [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 "FeatureLayerFeatureService.h"

#include "Map.h"
#include "MapQuickView.h"
#include "FeatureLayer.h"
#include "Basemap.h"
#include "SpatialReference.h"
#include "ServiceFeatureTable.h"
#include "Viewpoint.h"
#include "Point.h"
#include <QUrl>

using namespace Esri::ArcGISRuntime;

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

FeatureLayerFeatureService::~FeatureLayerFeatureService() = default;
void FeatureLayerFeatureService::init()
{
  qmlRegisterType<MapQuickView>("Esri.Samples", 1, 0, "MapView");
  qmlRegisterType<FeatureLayerFeatureService>("Esri.Samples", 1, 0, "FeatureLayerFeatureServiceSample");
}

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

  // find QML MapView component
  m_mapView = findChild<MapQuickView*>("mapView");
  m_mapView->setWrapAroundMode(WrapAroundMode::Disabled);

  // Create a map using the terrain with labels basemap
  m_map = new Map(BasemapStyle::ArcGISTerrain, this);
  m_map->setInitialViewpoint(Viewpoint(Point(-13176752, 4090404, SpatialReference(102100)), 300000));

  // Set map to map view
  m_mapView->setMap(m_map);

  //! [Display Feature Service]
  // create the feature table
  m_featureTable = new ServiceFeatureTable(QUrl("https://sampleserver6.arcgisonline.com/arcgis/rest/services/Energy/Geology/FeatureServer/9"), this);

  // create the feature layer using the feature table
  m_featureLayer = new FeatureLayer(m_featureTable, this);

  // add the feature layer to the map
  m_map->operationalLayers()->append(m_featureLayer);
  //! [Display Feature Service]
}

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