Maps and Navigation (C++) | Qt Location 5.15.18

- Qt 5.15
- Qt Location
- Maps and Navigation (C++)
- Qt 5.15.18 Reference Documentation

# Maps and Navigation (C++)

Maps and Navigation provides C++ utilities for geocoding (finding a geographic coordinate from a street address) and navigation (including driving and walking directions).

Currently it is not possible to interact with maps via C++. Mapping applications must use the Maps and Navigation (QML) API.

## Geocoding

In C++, an address-to-coordinate query is performed using the geocode() method of the QGeoCodingManager class. For coordinate-to-address queries, the reverseGeocode() method is available on the same class. Instances of QGeoCodingManager are available via QGeoServiceProvider.

Key Classes

QGeoServiceProvider | Provides a QGeoCodingManager instance ready for use.
QGeoCodingManager | Accepts queries and produces QGeoCodeReply objects.
QGeoCodeReply | Contains the results of a geocoding query.

## Navigation

In C++, a route query is performed using the calculate() method of the QGeoRoutingManager class. The returned route reply can contain multiple routes to the same destination.

Key Classes

QGeoServiceProvider | Provides a QGeoCodingManager instance ready for use.
QGeoRoutingManager | Accepts queries and produces QGeoRouteReply objects.
QGeoRouteReply | Contains the results of a routing query.
QGeoRoute | Contains information about a route.