Overview

The identifying string for this module is QtLocation. To use include the following import statement in the QML file.

import QtLocation 5.3

Location QML Concepts

Provided that a position has been obtained this module can add a Map with positions of interest and Places. The user can be made aware of nearby features and related information, displayed graphically. Features on the Map may be places of business, entertainment and so on. They may include paths, roads, or forms of transport leading so that navigation optimization and assistance are possible.

To perform navigation we need Routes from start to destination. These routes are made up of segments. Each RouteSegment can be considered a navigation sub-task: drive 100 meters, turn left. The beginning and end of each segment is a waypoint, that is, one part of our journey.

A typical use case for the API is a user looking for a particular type of place, say a restaurant. The user could enter a search string into the map application and respond to a list or display of results for restaurants "near" the device. The application could then be used to navigate to the restaurant using an optimized route that is aware of features in the environment that can help or hinder the journey. The navigation then proceeds with the user's progress monitored by means of the current Location. In the context of this API the map application would be aware of the location and size of various places and the location of the user. Plugins would supply the data used by the application to determine routes and navigation instructions. The Place types would hold information about the destination and surrounding objects including displayable representations. The Map type would enable this information to be displayed, panned, zoomed and so on. The Route would be determined by a plugin with each RouteSegment holding the navigation instructions guided by the updated current Location.

Plugins are a means of specifying which Location based service to use. For example, a plugin may allow connection to a provider's service that handles geocoding and routing that the API and application can use. There may be various GeoServices plugins for various tasks with some plugins providing more than one service. One QML Plugin should be created for each required GeoService plugin. Plugins are required for maps, routing and geocoding, however the default plugin handles all three of these services. A plugin may require online access or may support on-board maps and data. The default "nokia" plugin only supports online use. The connection would be managed by QNetworkInfo and QNetworkConfigurationManager.

Note: : Plugins may not provide various features such as paging or relevance hints. Since plugins may be supplied by other providers, support for these aspects is dependent on the provider's implementation.

The following table provides links to more detailed information on sections of the Qt Location QML API.

Common QML Types

Maps QML Types

Navigation and Routing QML Types

Geocoding QML Types

Places QML Types

Alphabetical Listing of All QML Types