Qt Location GeoServices

The Qt Location provides the majority of its functionality through GeoService plugins. This document outlines how to develop a new GeoService plugin.

Plugin Description

Each plugin is described by a json file. The json describes the plugins capabilities and version. Below is an example of a json file used by the OpenStreenMap plugin:

{
    "Keys": ["osm"],
    "Provider": "osm",
    "Version": 100,
    "Experimental": false,
    "Features": [
        "OnlineMappingFeature",
        "OnlineGeocodingFeature",
        "ReverseGeocodingFeature",
        "OnlineRoutingFeature",
        "OnlinePlacesFeature"
    ]
}

The entries have the following meaning:

Implementing Plugins

A plugin implementer needs to subclass QGeoServiceProviderFactory and as many of the ManagerEngine classes as they want to provide implementations for.

Subclassing QGeoServiceProviderFactory will only involves overriding of one of the following methods:

• QGeoServiceProviderFactory::createGeocodingManagerEngine()
• QGeoServiceProviderFactory::createRoutingManagerEngine()
• QGeoServiceProviderFactory::createPlaceManagerEngine()

If a plugin does not provide an engine the relevant function should return 0.