Add a point, line, and polygon
Learn how to display point, line, and polygon graphics in a map.

You typically use graphics to display geographic data that is not connected to a database and that is not persisted, like highlighting a route between two locations, displaying a search buffer around a point, or tracking the location of a vehicle in real-time. Graphics are composed of a geometry, symbol, and attributes.
In this tutorial, you display points, lines, and polygons on a map as graphics.
To learn how to display data from data sources, see the Add a feature layer tutorial.
Prerequisites
The following are required for this tutorial:
- An ArcGIS account to access API keys. If you don't have an account, sign up for free.
- Your system meets the system requirements.
- The ArcGIS Runtime API for Qt is installed.
Steps
Open the project in Qt Creator
To start this tutorial, complete the Display a map tutorial or download and unzip the solution.
Open the display_a_map project in Qt Creator.
If you downloaded the Display a map solution, set your API key.
An API Key enables access to services, web maps, and web scenes hosted in ArcGIS Online.
Go to your developer dashboard to get your API key. For these tutorials, use your default API key. It is scoped to include all of the services demonstrated in the tutorials.
Under Projects, in the display_a_map project, double click Sources > Display_a_map.cpp to open the file.
Replace the string
YOUR_API_KEY
with the API key from your dashboard.Display_a_map.cppChange line Change line // Copyright 2020 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 // // https://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. #include "Display_a_map.h" #include "ArcGISRuntimeEnvironment.h" #include "Basemap.h" #include "Map.h" #include "MapQuickView.h" #include <QUrl> using namespace Esri::ArcGISRuntime; Display_a_map::Display_a_map(QObject* parent /* = nullptr */): QObject(parent), m_map(new Map(BasemapStyle::ArcGISTopographic, this)) { // Note: It is not best practice to store API keys in source code. The API key is referenced here for the convenience of this tutorial. const QString api_key = QStringLiteral("YOUR_API_KEY"); ArcGISRuntimeEnvironment::setApiKey(api_key); } Display_a_map::~Display_a_map() { } MapQuickView* Display_a_map::mapView() const { return m_mapView; } void Display_a_map::setupMap() { const Point center(-118.80543, 34.02700, SpatialReference::wgs84()); const Viewpoint viewpoint(center, 100000.0); m_mapView->setViewpoint(viewpoint); } // Set the view (created in QML) void Display_a_map::setMapView(MapQuickView* mapView) { if (!mapView || mapView == m_mapView) { return; } m_mapView = mapView; m_mapView->setMap(m_map); setupMap(); emit mapViewChanged(); }
Add GraphicsOverlay class, declare member function
GraphicsOverlay
is a container for temporary graphics to display on your map view. The graphics drawn in graphics overlays are created at runtime and are not persisted when your application closes. Learn more about GraphicsOverlay
.
In the display_a_map project, double click Headers > Display_a_map.h to open the file. Add the
GraphicsOverlay
class to thenamespace ArcGISRuntime
declaration.Display_a_map.hAdd line. 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 18 19 20 21 22 23 24 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 24 23 23 23 23 23 23 23 23// Copyright 2020 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 // // https://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. #ifndef DISPLAY_A_MAP_H #define DISPLAY_A_MAP_H namespace Esri { namespace ArcGISRuntime { class Map; class MapQuickView; class GraphicsOverlay; } } #include <QObject> class Display_a_map : public QObject { Q_OBJECT Q_PROPERTY(Esri::ArcGISRuntime::MapQuickView* mapView READ mapView WRITE setMapView NOTIFY mapViewChanged) public: explicit Display_a_map(QObject* parent = nullptr); ~Display_a_map() override; signals: void mapViewChanged(); private: Esri::ArcGISRuntime::MapQuickView* mapView() const; void setMapView(Esri::ArcGISRuntime::MapQuickView* mapView); void setupMap(); void createGraphics(Esri::ArcGISRuntime::GraphicsOverlay* overlay); Esri::ArcGISRuntime::Map* m_map = nullptr; Esri::ArcGISRuntime::MapQuickView* m_mapView = nullptr; }; #endif // DISPLAY_A_MAP_H
Add the
createGraphics
public member function declaration. Then save and close the header file.Display_a_map.hAdd line. 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 46 47 48 49 50 51 51 51 51 51 51 51 51 51// Copyright 2020 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 // // https://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. #ifndef DISPLAY_A_MAP_H #define DISPLAY_A_MAP_H namespace Esri { namespace ArcGISRuntime { class Map; class MapQuickView; class GraphicsOverlay; } } #include <QObject> class Display_a_map : public QObject { Q_OBJECT Q_PROPERTY(Esri::ArcGISRuntime::MapQuickView* mapView READ mapView WRITE setMapView NOTIFY mapViewChanged) public: explicit Display_a_map(QObject* parent = nullptr); ~Display_a_map() override; signals: void mapViewChanged(); private: Esri::ArcGISRuntime::MapQuickView* mapView() const; void setMapView(Esri::ArcGISRuntime::MapQuickView* mapView); void setupMap(); void createGraphics(Esri::ArcGISRuntime::GraphicsOverlay* overlay); Esri::ArcGISRuntime::Map* m_map = nullptr; Esri::ArcGISRuntime::MapQuickView* m_mapView = nullptr; }; #endif // DISPLAY_A_MAP_H
Create a graphics overlay
A graphics overlay is a container for graphics. It is added to a map view to display graphics on a map. You can add more than one graphics overlay to a map view. Graphics overlays are displayed on top of all the other layers.
Double click on Sources > Display_a_map.cpp to open the file. Include the five classes shown.
Display_a_map.cppAdd line. Add line. Add line. Add line. Add line. 14 14 14 14 14 14 14 14 14 14 14 14 14 14 15 16 17 18 19 20 21 22 23 24 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 24 23 22 21 21 21 21 21 21 21 21 21 21 21 20 19 18 16 14 12 10 8 6 4 2 0 -2 -4 -6 -8 -10 -12 -14 -16 -18 -20 -22 -24 -26 -28 -30 -32 -34 -36 -38 -40 -42 -44 -46 -48 -50 -52 -54 -56 -58 -60 -62 -64 -66 -68 -70 -71// Copyright 2020 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 // // https://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. #include "ArcGISRuntimeEnvironment.h" #include "Display_a_map.h" #include "Map.h" #include "MapQuickView.h" #include "GraphicsOverlay.h" #include "PolylineBuilder.h" #include "PolygonBuilder.h" #include "SimpleMarkerSymbol.h" #include "SimpleFillSymbol.h" using namespace Esri::ArcGISRuntime; Display_a_map::Display_a_map(QObject* parent /* = nullptr */): QObject(parent), m_map(new Map(BasemapStyle::ArcGISTopographic, this)) { // Note: it is not best practice to store API keys in source code. The API key is referenced here for the convenience of this tutorial. const QString api_key("YOUR_API_KEY"); ArcGISRuntimeEnvironment::setApiKey(api_key); } Display_a_map::~Display_a_map() { } MapQuickView* Display_a_map::mapView() const { return m_mapView; } // Set the view (created in QML) void Display_a_map::setMapView(MapQuickView* mapView) { if (!mapView || mapView == m_mapView) { return; } m_mapView = mapView; m_mapView->setMap(m_map); setupMap(); GraphicsOverlay* overlay = new GraphicsOverlay(this); createGraphics(overlay); m_mapView->graphicsOverlays()->append(overlay); emit mapViewChanged(); } void Display_a_map::setupMap() { const Point center(-118.80543, 34.02700, SpatialReference::wgs84()); const Viewpoint viewpoint(center, 100000.0); m_mapView->setViewpoint(viewpoint); } void Display_a_map::createGraphics(GraphicsOverlay *overlay) { // Create a point const Point dume_beach(-118.80657463861, 34.0005930608889, SpatialReference::wgs84()); // Create symbols for the point SimpleLineSymbol* point_outline = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::blue), 3, this); SimpleMarkerSymbol* point_symbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Circle, QColor(Qt::red), 10, this); point_symbol->setOutline(point_outline); // Create a graphic to display the point with its symbology Graphic* point_graphic = new Graphic(dume_beach, point_symbol, this); // Add point graphic to the graphics overlay overlay->graphics()->append(point_graphic); // Create a line PolylineBuilder* polyline_builder = new PolylineBuilder(SpatialReference::wgs84(), this); polyline_builder->addPoint(-118.8215, 34.0140); polyline_builder->addPoint(-118.8149, 34.0081); polyline_builder->addPoint(-118.8089, 34.0017); // Create a symbol for the line SimpleLineSymbol* line_symbol = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::blue), 3, this); // Create a graphic to display the line with its symbology Graphic* polyline_graphic = new Graphic(polyline_builder->toGeometry(), line_symbol, this); // Add line graphic to the graphics overlay overlay->graphics()->append(polyline_graphic); // Create a list of points to make up the polygon const QList<Point> points = { Point(-118.8190, 34.0138), Point(-118.8068, 34.0216), Point(-118.7914, 34.0164), Point(-118.7960, 34.0086), Point(-118.8086, 34.0035), }; // Create a polygon using the list of points above PolygonBuilder* polygon_builder = new PolygonBuilder(SpatialReference::wgs84(), this); polygon_builder->addPoints(points); // Create symbols for the polygon SimpleLineSymbol* polygon_line_symbol = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::blue), 3, this); SimpleFillSymbol* fill_symbol = new SimpleFillSymbol(SimpleFillSymbolStyle::Solid, QColor(Qt::yellow), polygon_line_symbol, this); // Create a graphic to display the polygon with its symbology Graphic* polygon_graphic = new Graphic(polygon_builder->toGeometry(), fill_symbol, this); // Add polygon graphic to the graphics overlay overlay->graphics()->append(polygon_graphic); }
In the
Display_a_map::setMapView
member function, add three lines of code to create aGraphicsOverlay
, call thecreateGraphics
method (implemented in following steps), and append the overlay to the map view.Display_a_map.cppAdd line. Add line. Add line. 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 64 64 64 64 64 64 64 64 63 62 61 59 57 55 53 51 49 47 45 43 41 39 37 35 33 31 29 27 25 23 21 19 17 15 13 11 9 7 5 3 1 -1 -3 -5 -7 -9 -11 -13 -15 -17 -19 -21 -23 -25 -27 -28// Copyright 2020 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 // // https://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. #include "ArcGISRuntimeEnvironment.h" #include "Display_a_map.h" #include "Map.h" #include "MapQuickView.h" #include "GraphicsOverlay.h" #include "PolylineBuilder.h" #include "PolygonBuilder.h" #include "SimpleMarkerSymbol.h" #include "SimpleFillSymbol.h" using namespace Esri::ArcGISRuntime; Display_a_map::Display_a_map(QObject* parent /* = nullptr */): QObject(parent), m_map(new Map(BasemapStyle::ArcGISTopographic, this)) { // Note: it is not best practice to store API keys in source code. The API key is referenced here for the convenience of this tutorial. const QString api_key("YOUR_API_KEY"); ArcGISRuntimeEnvironment::setApiKey(api_key); } Display_a_map::~Display_a_map() { } MapQuickView* Display_a_map::mapView() const { return m_mapView; } // Set the view (created in QML) void Display_a_map::setMapView(MapQuickView* mapView) { if (!mapView || mapView == m_mapView) { return; } m_mapView = mapView; m_mapView->setMap(m_map); setupMap(); GraphicsOverlay* overlay = new GraphicsOverlay(this); createGraphics(overlay); m_mapView->graphicsOverlays()->append(overlay); emit mapViewChanged(); } void Display_a_map::setupMap() { const Point center(-118.80543, 34.02700, SpatialReference::wgs84()); const Viewpoint viewpoint(center, 100000.0); m_mapView->setViewpoint(viewpoint); } void Display_a_map::createGraphics(GraphicsOverlay *overlay) { // Create a point const Point dume_beach(-118.80657463861, 34.0005930608889, SpatialReference::wgs84()); // Create symbols for the point SimpleLineSymbol* point_outline = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::blue), 3, this); SimpleMarkerSymbol* point_symbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Circle, QColor(Qt::red), 10, this); point_symbol->setOutline(point_outline); // Create a graphic to display the point with its symbology Graphic* point_graphic = new Graphic(dume_beach, point_symbol, this); // Add point graphic to the graphics overlay overlay->graphics()->append(point_graphic); // Create a line PolylineBuilder* polyline_builder = new PolylineBuilder(SpatialReference::wgs84(), this); polyline_builder->addPoint(-118.8215, 34.0140); polyline_builder->addPoint(-118.8149, 34.0081); polyline_builder->addPoint(-118.8089, 34.0017); // Create a symbol for the line SimpleLineSymbol* line_symbol = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::blue), 3, this); // Create a graphic to display the line with its symbology Graphic* polyline_graphic = new Graphic(polyline_builder->toGeometry(), line_symbol, this); // Add line graphic to the graphics overlay overlay->graphics()->append(polyline_graphic); // Create a list of points to make up the polygon const QList<Point> points = { Point(-118.8190, 34.0138), Point(-118.8068, 34.0216), Point(-118.7914, 34.0164), Point(-118.7960, 34.0086), Point(-118.8086, 34.0035), }; // Create a polygon using the list of points above PolygonBuilder* polygon_builder = new PolygonBuilder(SpatialReference::wgs84(), this); polygon_builder->addPoints(points); // Create symbols for the polygon SimpleLineSymbol* polygon_line_symbol = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::blue), 3, this); SimpleFillSymbol* fill_symbol = new SimpleFillSymbol(SimpleFillSymbolStyle::Solid, QColor(Qt::yellow), polygon_line_symbol, this); // Create a graphic to display the polygon with its symbology Graphic* polygon_graphic = new Graphic(polygon_builder->toGeometry(), fill_symbol, this); // Add polygon graphic to the graphics overlay overlay->graphics()->append(polygon_graphic); }
Create a new method named
Display_a_map::createGraphics
, right after theDisplay_a_map::setupMap
method.Display_a_map.cppAdd line. Add line. Add line. Add line. 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 66 67 68 69 70 71 72 73 74 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 76// Copyright 2020 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 // // https://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. #include "ArcGISRuntimeEnvironment.h" #include "Display_a_map.h" #include "Map.h" #include "MapQuickView.h" #include "GraphicsOverlay.h" #include "PolylineBuilder.h" #include "PolygonBuilder.h" #include "SimpleMarkerSymbol.h" #include "SimpleFillSymbol.h" using namespace Esri::ArcGISRuntime; Display_a_map::Display_a_map(QObject* parent /* = nullptr */): QObject(parent), m_map(new Map(BasemapStyle::ArcGISTopographic, this)) { // Note: it is not best practice to store API keys in source code. The API key is referenced here for the convenience of this tutorial. const QString api_key("YOUR_API_KEY"); ArcGISRuntimeEnvironment::setApiKey(api_key); } Display_a_map::~Display_a_map() { } MapQuickView* Display_a_map::mapView() const { return m_mapView; } // Set the view (created in QML) void Display_a_map::setMapView(MapQuickView* mapView) { if (!mapView || mapView == m_mapView) { return; } m_mapView = mapView; m_mapView->setMap(m_map); setupMap(); GraphicsOverlay* overlay = new GraphicsOverlay(this); createGraphics(overlay); m_mapView->graphicsOverlays()->append(overlay); emit mapViewChanged(); } void Display_a_map::setupMap() { const Point center(-118.80543, 34.02700, SpatialReference::wgs84()); const Viewpoint viewpoint(center, 100000.0); m_mapView->setViewpoint(viewpoint); } void Display_a_map::createGraphics(GraphicsOverlay *overlay) { // Create a point const Point dume_beach(-118.80657463861, 34.0005930608889, SpatialReference::wgs84()); // Create symbols for the point SimpleLineSymbol* point_outline = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::blue), 3, this); SimpleMarkerSymbol* point_symbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Circle, QColor(Qt::red), 10, this); point_symbol->setOutline(point_outline); // Create a graphic to display the point with its symbology Graphic* point_graphic = new Graphic(dume_beach, point_symbol, this); // Add point graphic to the graphics overlay overlay->graphics()->append(point_graphic); // Create a line PolylineBuilder* polyline_builder = new PolylineBuilder(SpatialReference::wgs84(), this); polyline_builder->addPoint(-118.8215, 34.0140); polyline_builder->addPoint(-118.8149, 34.0081); polyline_builder->addPoint(-118.8089, 34.0017); // Create a symbol for the line SimpleLineSymbol* line_symbol = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::blue), 3, this); // Create a graphic to display the line with its symbology Graphic* polyline_graphic = new Graphic(polyline_builder->toGeometry(), line_symbol, this); // Add line graphic to the graphics overlay overlay->graphics()->append(polyline_graphic); // Create a list of points to make up the polygon const QList<Point> points = { Point(-118.8190, 34.0138), Point(-118.8068, 34.0216), Point(-118.7914, 34.0164), Point(-118.7960, 34.0086), Point(-118.8086, 34.0035), }; // Create a polygon using the list of points above PolygonBuilder* polygon_builder = new PolygonBuilder(SpatialReference::wgs84(), this); polygon_builder->addPoints(points); // Create symbols for the polygon SimpleLineSymbol* polygon_line_symbol = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::blue), 3, this); SimpleFillSymbol* fill_symbol = new SimpleFillSymbol(SimpleFillSymbolStyle::Solid, QColor(Qt::yellow), polygon_line_symbol, this); // Create a graphic to display the polygon with its symbology Graphic* polygon_graphic = new Graphic(polygon_builder->toGeometry(), fill_symbol, this); // Add polygon graphic to the graphics overlay overlay->graphics()->append(polygon_graphic); }
Add a point graphic
A point graphic is created using a point and a marker symbol. A point is defined with x and y coordinates for longitude and latitude coordinates, and a spatial reference. The spatial reference is WGS84.
Create a
Point
and aSimpleMarkerSymbol
. To create thePoint
, provide longitude (x) and latitude (y) coordinates, and aSpatialReference
.Point graphics support a number of symbol types such as
SimpleMarkerSymbol
,PictureMarkerSymbol
andTextSymbol
. SeeSymbol
in the API documentation to learn more about symbols.Display_a_map.cppAdd line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 54// Copyright 2020 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 // // https://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. #include "ArcGISRuntimeEnvironment.h" #include "Display_a_map.h" #include "Map.h" #include "MapQuickView.h" #include "GraphicsOverlay.h" #include "PolylineBuilder.h" #include "PolygonBuilder.h" #include "SimpleMarkerSymbol.h" #include "SimpleFillSymbol.h" using namespace Esri::ArcGISRuntime; Display_a_map::Display_a_map(QObject* parent /* = nullptr */): QObject(parent), m_map(new Map(BasemapStyle::ArcGISTopographic, this)) { // Note: it is not best practice to store API keys in source code. The API key is referenced here for the convenience of this tutorial. const QString api_key("YOUR_API_KEY"); ArcGISRuntimeEnvironment::setApiKey(api_key); } Display_a_map::~Display_a_map() { } MapQuickView* Display_a_map::mapView() const { return m_mapView; } // Set the view (created in QML) void Display_a_map::setMapView(MapQuickView* mapView) { if (!mapView || mapView == m_mapView) { return; } m_mapView = mapView; m_mapView->setMap(m_map); setupMap(); GraphicsOverlay* overlay = new GraphicsOverlay(this); createGraphics(overlay); m_mapView->graphicsOverlays()->append(overlay); emit mapViewChanged(); } void Display_a_map::setupMap() { const Point center(-118.80543, 34.02700, SpatialReference::wgs84()); const Viewpoint viewpoint(center, 100000.0); m_mapView->setViewpoint(viewpoint); } void Display_a_map::createGraphics(GraphicsOverlay *overlay) { // Create a point const Point dume_beach(-118.80657463861, 34.0005930608889, SpatialReference::wgs84()); // Create symbols for the point SimpleLineSymbol* point_outline = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::blue), 3, this); SimpleMarkerSymbol* point_symbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Circle, QColor(Qt::red), 10, this); point_symbol->setOutline(point_outline); // Create a graphic to display the point with its symbology Graphic* point_graphic = new Graphic(dume_beach, point_symbol, this); // Add point graphic to the graphics overlay overlay->graphics()->append(point_graphic); // Create a line PolylineBuilder* polyline_builder = new PolylineBuilder(SpatialReference::wgs84(), this); polyline_builder->addPoint(-118.8215, 34.0140); polyline_builder->addPoint(-118.8149, 34.0081); polyline_builder->addPoint(-118.8089, 34.0017); // Create a symbol for the line SimpleLineSymbol* line_symbol = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::blue), 3, this); // Create a graphic to display the line with its symbology Graphic* polyline_graphic = new Graphic(polyline_builder->toGeometry(), line_symbol, this); // Add line graphic to the graphics overlay overlay->graphics()->append(polyline_graphic); // Create a list of points to make up the polygon const QList<Point> points = { Point(-118.8190, 34.0138), Point(-118.8068, 34.0216), Point(-118.7914, 34.0164), Point(-118.7960, 34.0086), Point(-118.8086, 34.0035), }; // Create a polygon using the list of points above PolygonBuilder* polygon_builder = new PolygonBuilder(SpatialReference::wgs84(), this); polygon_builder->addPoints(points); // Create symbols for the polygon SimpleLineSymbol* polygon_line_symbol = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::blue), 3, this); SimpleFillSymbol* fill_symbol = new SimpleFillSymbol(SimpleFillSymbolStyle::Solid, QColor(Qt::yellow), polygon_line_symbol, this); // Create a graphic to display the polygon with its symbology Graphic* polygon_graphic = new Graphic(polygon_builder->toGeometry(), fill_symbol, this); // Add polygon graphic to the graphics overlay overlay->graphics()->append(polygon_graphic); }
Press <Ctrl+R> to run the app.
You should see a point graphic at Point Dume State Beach, California.
Add a polyline graphic
A line graphic is created using a polyline and a line symbol. A polyline is defined as a sequence of points.
Polylines have one or more distinct parts. Each part is defined by two points. To create a continuous line with just one part, use the Polyline
constructor. To create a polyline with more than one part, use a PolylineBuilder
. Polyline graphics support a number of symbol types, such as SimpleLineSymbol
and TextSymbol
. See Symbol
in the API documentation to learn more about symbols.
Create a
Polyline
and aSimpleLineSymbol
.To create the
Polyline
, create a newPointCollection
with aSpatialReference
and usePolylineBuider
to add a newPoint
s to it. Add the highlighted code.App.cppAdd line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 80// Copyright 2020 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 // // https://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. #include "ArcGISRuntimeEnvironment.h" #include "Display_a_map.h" #include "Map.h" #include "MapQuickView.h" #include "GraphicsOverlay.h" #include "PolylineBuilder.h" #include "PolygonBuilder.h" #include "SimpleMarkerSymbol.h" #include "SimpleFillSymbol.h" using namespace Esri::ArcGISRuntime; Display_a_map::Display_a_map(QObject* parent /* = nullptr */): QObject(parent), m_map(new Map(BasemapStyle::ArcGISTopographic, this)) { // Note: it is not best practice to store API keys in source code. The API key is referenced here for the convenience of this tutorial. const QString api_key("YOUR_API_KEY"); ArcGISRuntimeEnvironment::setApiKey(api_key); } Display_a_map::~Display_a_map() { } MapQuickView* Display_a_map::mapView() const { return m_mapView; } // Set the view (created in QML) void Display_a_map::setMapView(MapQuickView* mapView) { if (!mapView || mapView == m_mapView) { return; } m_mapView = mapView; m_mapView->setMap(m_map); setupMap(); GraphicsOverlay* overlay = new GraphicsOverlay(this); createGraphics(overlay); m_mapView->graphicsOverlays()->append(overlay); emit mapViewChanged(); } void Display_a_map::setupMap() { const Point center(-118.80543, 34.02700, SpatialReference::wgs84()); const Viewpoint viewpoint(center, 100000.0); m_mapView->setViewpoint(viewpoint); } void Display_a_map::createGraphics(GraphicsOverlay *overlay) { // Create a point const Point dume_beach(-118.80657463861, 34.0005930608889, SpatialReference::wgs84()); // Create symbols for the point SimpleLineSymbol* point_outline = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::blue), 3, this); SimpleMarkerSymbol* point_symbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Circle, QColor(Qt::red), 10, this); point_symbol->setOutline(point_outline); // Create a graphic to display the point with its symbology Graphic* point_graphic = new Graphic(dume_beach, point_symbol, this); // Add point graphic to the graphics overlay overlay->graphics()->append(point_graphic); // Create a line PolylineBuilder* polyline_builder = new PolylineBuilder(SpatialReference::wgs84(), this); polyline_builder->addPoint(-118.8215, 34.0140); polyline_builder->addPoint(-118.8149, 34.0081); polyline_builder->addPoint(-118.8089, 34.0017); // Create a symbol for the line SimpleLineSymbol* line_symbol = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::blue), 3, this); // Create a graphic to display the line with its symbology Graphic* polyline_graphic = new Graphic(polyline_builder->toGeometry(), line_symbol, this); // Add line graphic to the graphics overlay overlay->graphics()->append(polyline_graphic); // Create a list of points to make up the polygon const QList<Point> points = { Point(-118.8190, 34.0138), Point(-118.8068, 34.0216), Point(-118.7914, 34.0164), Point(-118.7960, 34.0086), Point(-118.8086, 34.0035), }; // Create a polygon using the list of points above PolygonBuilder* polygon_builder = new PolygonBuilder(SpatialReference::wgs84(), this); polygon_builder->addPoints(points); // Create symbols for the polygon SimpleLineSymbol* polygon_line_symbol = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::blue), 3, this); SimpleFillSymbol* fill_symbol = new SimpleFillSymbol(SimpleFillSymbolStyle::Solid, QColor(Qt::yellow), polygon_line_symbol, this); // Create a graphic to display the polygon with its symbology Graphic* polygon_graphic = new Graphic(polygon_builder->toGeometry(), fill_symbol, this); // Add polygon graphic to the graphics overlay overlay->graphics()->append(polygon_graphic); }
Press <Ctrl+R> to run the app.
You should see a point and a line graphic along Westward Beach.
Add a polygon graphic
A polygon graphic is created using a polygon and a fill symbol. A polygon is defined as a sequence of points that describe a closed boundary.
Polygons have one or more distinct parts. Each part is a sequence of points describing a closed boundary. For a single area with no holes, you can use Polygon
to create a polygon with just one part. To create a polygon with more than one part, use PolygonBuilder
.
Polygon graphics support a number of symbol types such as SimpleFillSymbol
, PictureFillSymbol
, SimpleMarkerSymbol
, and TextSymbol
. See Symbol
in the API documentation to learn more about symbols.
Create a
Polygon
and aSimpleFillSymbol
. To create thePolygon
, create a newPointCollection
with aSpatialReference
and usePolygonBuilder
to add newPoint
s to it. Add the highlighted code.App.cppAdd line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. Add line. 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 118 118// Copyright 2020 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 // // https://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. #include "ArcGISRuntimeEnvironment.h" #include "Display_a_map.h" #include "Map.h" #include "MapQuickView.h" #include "GraphicsOverlay.h" #include "PolylineBuilder.h" #include "PolygonBuilder.h" #include "SimpleMarkerSymbol.h" #include "SimpleFillSymbol.h" using namespace Esri::ArcGISRuntime; Display_a_map::Display_a_map(QObject* parent /* = nullptr */): QObject(parent), m_map(new Map(BasemapStyle::ArcGISTopographic, this)) { // Note: it is not best practice to store API keys in source code. The API key is referenced here for the convenience of this tutorial. const QString api_key("YOUR_API_KEY"); ArcGISRuntimeEnvironment::setApiKey(api_key); } Display_a_map::~Display_a_map() { } MapQuickView* Display_a_map::mapView() const { return m_mapView; } // Set the view (created in QML) void Display_a_map::setMapView(MapQuickView* mapView) { if (!mapView || mapView == m_mapView) { return; } m_mapView = mapView; m_mapView->setMap(m_map); setupMap(); GraphicsOverlay* overlay = new GraphicsOverlay(this); createGraphics(overlay); m_mapView->graphicsOverlays()->append(overlay); emit mapViewChanged(); } void Display_a_map::setupMap() { const Point center(-118.80543, 34.02700, SpatialReference::wgs84()); const Viewpoint viewpoint(center, 100000.0); m_mapView->setViewpoint(viewpoint); } void Display_a_map::createGraphics(GraphicsOverlay *overlay) { // Create a point const Point dume_beach(-118.80657463861, 34.0005930608889, SpatialReference::wgs84()); // Create symbols for the point SimpleLineSymbol* point_outline = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::blue), 3, this); SimpleMarkerSymbol* point_symbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Circle, QColor(Qt::red), 10, this); point_symbol->setOutline(point_outline); // Create a graphic to display the point with its symbology Graphic* point_graphic = new Graphic(dume_beach, point_symbol, this); // Add point graphic to the graphics overlay overlay->graphics()->append(point_graphic); // Create a line PolylineBuilder* polyline_builder = new PolylineBuilder(SpatialReference::wgs84(), this); polyline_builder->addPoint(-118.8215, 34.0140); polyline_builder->addPoint(-118.8149, 34.0081); polyline_builder->addPoint(-118.8089, 34.0017); // Create a symbol for the line SimpleLineSymbol* line_symbol = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::blue), 3, this); // Create a graphic to display the line with its symbology Graphic* polyline_graphic = new Graphic(polyline_builder->toGeometry(), line_symbol, this); // Add line graphic to the graphics overlay overlay->graphics()->append(polyline_graphic); // Create a list of points to make up the polygon const QList<Point> points = { Point(-118.8190, 34.0138), Point(-118.8068, 34.0216), Point(-118.7914, 34.0164), Point(-118.7960, 34.0086), Point(-118.8086, 34.0035), }; // Create a polygon using the list of points above PolygonBuilder* polygon_builder = new PolygonBuilder(SpatialReference::wgs84(), this); polygon_builder->addPoints(points); // Create symbols for the polygon SimpleLineSymbol* polygon_line_symbol = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor(Qt::blue), 3, this); SimpleFillSymbol* fill_symbol = new SimpleFillSymbol(SimpleFillSymbolStyle::Solid, QColor(Qt::yellow), polygon_line_symbol, this); // Create a graphic to display the polygon with its symbology Graphic* polygon_graphic = new Graphic(polygon_builder->toGeometry(), fill_symbol, this); // Add polygon graphic to the graphics overlay overlay->graphics()->append(polygon_graphic); }
Press <Ctrl+R> to run the app.
You should see a point, line, and polygon graphic around Mahou Riviera in the Santa Monica Mountains.
What's next?
Learn how to use additional API features, ArcGIS platform services, and ArcGIS tools in these tutorials: