Display a web map

Learn how to create and display a map from a web map stored in ArcGIS.

display a web map

A web map contains the definition of a map, including properties such as the basemap, initial extent, layers, styles, pop-ups, and labels. You can author and save web maps using the Map Viewer or ArcGIS Pro and share them in ArcGIS. Each web map is stored as an item in ArcGIS Online or ArcGIS Enterprise, allowing you to access a web map from a portal using its item ID and display it in your app.

In this tutorial, you use a web map's item ID to display a map of trails, trailheads and parks in the Santa Monica Mountains . The web map is hosted in ArcGIS Online.

Prerequisites

The following are required for this tutorial:

  1. An ArcGIS account to access API keys. If you don't have an account, sign up for free.
  2. Your system meets the system requirements.
  3. The ArcGIS Maps SDK for Qt, version 200.3.0 or later is installed.
  4. The Qt 6.5.1 software development framework is installed.

Open the project and set the API key

  1. To start this tutorial, complete the Display a map tutorial or download and unzip the solution.

  2. Open the display_a_map project in Qt Creator.

  3. If you downloaded the Display a map solution, set your API key.

Get the web map item ID

You can use ArcGIS tools to create and view web maps. Use the Map Viewer to identify the web map item ID. This item ID will be used later in the tutorial.

  1. Go to the LA Trails and Parks web map in the Map Viewer in ArcGIS Online. This web map displays trails, trailheads and parks in the Santa Monica Mountains.
  2. Make a note of the item ID at the end of the browser's URL. The item ID should be

    41281c51f9de45edaf1c8ed44bb10e30

Initialize the map using a web map

  1. In Projects, double-click Sources > Display_a_map.cpp to open the file.

  2. Remove the four classes shown. These are not needed when displaying a web map.

    Display_a_map.cpp
    Expand
    Use dark colors for code blocks
    12 12 12 12 12 12 12 12 12 12 12 12 13 14 15 16 17 18 19 20 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21
    Remove lineRemove lineRemove lineRemove line
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53
    54
    55
    56
    57
    58
    59
    60
    61
    62
    63
    64
    65
    66
    67
    68
    #include "Display_a_map.h"
    #include "Map.h"
    #include "MapTypes.h"
    #include "MapQuickView.h"
    
    #include "Point.h"
    #include "Viewpoint.h"
    #include "SpatialReference.h"
    #include <QFuture>
    
    Expand
  3. Remove the comma after QObject(parent) and then modify the constructor to remove initialization with BasemapStyle and the Map.

    Display_a_map.cpp
    Use dark colors for code blocks
    24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 25 26 27 28 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29
    Change lineRemove line
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53
    54
    55
    56
    57
    58
    59
    60
    61
    62
    63
    64
    65
    66
    67
    68
    Display_a_map::Display_a_map(QObject* parent /* = nullptr */):
    
        QObject(parent),
    
        m_map(new Map(BasemapStyle::ArcGISTopographic, this))
    
  4. In the setupViewpoint() method, replace the existing code with the following. This code creates a QString named item_id and sets it to the item ID for the LA Trails and Parks web map. It appends the item ID to the ArcGIS Online base URL and stores it in a QUrl. The new code creates a Map from the web map configuration specified by the item ID.

    Display_a_map.cpp
    Expand
    Use dark colors for code blocks
    28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 29 30 31 32 33 34 35 36 37 38 39 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40
    Change lineChange lineChange lineChange line
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53
    54
    55
    MapQuickView* Display_a_map::mapView() const
    {
        return m_mapView;
    }
    
    void Display_a_map::setupViewpoint()
    {
    
        const QString item_id("41281c51f9de45edaf1c8ed44bb10e30");
        const QUrl portal_url(QString("https://arcgis.com/sharing/rest/content/items/" + item_id));
        m_map = new Map(portal_url, this);
        m_mapView->setMap(m_map);
    
    Expand
  5. Press Ctrl + R to run the app.

You will see a map of trails, trailheads and parks in the Santa Monica Mountains. Click, drag, and scroll the mouse wheel on the map view to explore the map.

What's next?

Learn how to use additional API features, ArcGIS location services, and ArcGIS tools in these tutorials:

Your browser is no longer supported. Please upgrade your browser for the best experience. See our browser deprecation post for more details.