Qt Location

The Qt Location API helps you create viable mapping solutions using the data available from some of the popular location services.

概述

Qt Location API 能够：

access and present map data,
support touch gesture on a specific area of the map,
query for a specific geographical location and route,
add additional layers on top, such as polylines and circles,
and search for places and related images.

快速入门

To load the Qt Location module, add the following statement to your .qml files

import QtPositioning 5.12
import QtLocation 5.12

QtLocation QML module depends on the QtPositioning QML module. Therefore every QML application that imports the QtLocation QML module must always import the QtPositioning module as well.

For C++ projects include the header appropriate for the current use case, for example applications using routes may use

#include <QGeoRoute>

.pro 文件应有 location 添加关键词

QT += location

子模块

The API is split into sub-modules, which provide QML and C++ interfaces for specific purposes. They focus mainly on Map and Place information. The required position data can be retrieved using the QtPositioning 模块。

Places

The Places submodule is the natural complement to Positioning, providing a source of geographical data about Places of Interest (POI). Besides the source information, the API provides information about the location, size, and other related information about a POI. The Places API can also retrieve images, reviews, and other content related to a place.

Places introduction:

for QML

for C++

The module provides the QML and C++ alternatives for maps and navigation. The C++ alternative provides utility classes to get geocoding (finding a geographic coordinate from a street address) and navigation (including driving and walking directions) information, whereas its QML counterpart provides UI components to render the information.

Maps and Navigation introduction:

for QML

for C++

API 参考和范例

The following are lists of the classes and UI components provided by the module, with example applications to demonstrate their usage:

QML API Reference	Full list of QML components in the Qt Location API
C++ API Reference by domain	Full list of C++ classes and methods of the Qt Location APIs sorted by domain
C++ API Reference	Full list of C++ classes and methods of the Qt Location APIs
Example Apps	Examples demonstrating use of the Qt Location APIs
Maps and Navigation Tutorial	Tutorial introducing the QML Maps Types

插件参考和参数

Information about plugins, important notes on their usage, parameters that can be provided to influence their behavior.

Qt Location Esri Plugin	Uses Esri for location services.
Qt Location HERE Plugin	Uses the relevant services provided by HERE.
Qt Location Items Overlay Plugin	Provides an empty map intended to be used as background for an overlay layers for map items.
Qt Location Mapbox GL 插件	Uses Mapbox GL for location services.
Qt Location Mapbox Plugin	Uses Mapbox for location services.
Qt Location 开放式街道地图插件	Uses Open Street Map and related services.

实现新的后端和移植

For systems integrators and distributors, information related to making Qt Location available for a new platform.

GeoServices	Information about the Qt Location GeoServices plugins
Places	Information for places backend implementors
API 变化	Information about QML API changes since 5.4

许可和归属

Qt Location 在商业许可下是可用的来自 Qt 公司。此外，它是可用的根据 GNU LGPL (次一般公共许可) 第 3 版，或 GNU GPL (一般公共许可) 第 2 版。见 Qt 许可进一步了解细节。

此外，Qt Location 潜在包含的第 3 方模块遵循下列准许许可：

Boost	Boost 软件许可 1.0
CSS 颜色剖析器	MIT 许可
Clip2Tri Polygon Triangulation Library	MIT 许可
Clipper Polygon Clipping Library, version 6.4.0	Boost 软件许可 1.0
Earcut	ISC 许可
Earcut 多边形三角测量库	ISC 许可
Mapbox GL Native	BSD 2 条款简化许可
Poly2Tri Polygon Triangulation Library	BSD 3 条款新 (或修订) 许可
RapidJSON	MIT 许可
Vector Tile Library	ISC 许可
Wagyu Geometry Processing Library	MIT 许可
cURL 剖析日期	MIT 许可
geojson-cpp	ISC 许可
geojson-vt-cpp	ISC 许可
geometry.hpp	ISC 许可
kdbush.hpp	ISC 许可
libc++	MIT and UIUC (BSD-like)
nunicode	MIT 许可
polylabel	ISC 许可
protozero	BSD 2 条款简化许可
shelf-pack-cpp	ISC 许可
supercluster.hpp	ISC 许可
tao_tuple	MIT 许可
unique_resource	Boost 软件许可 1.0
variant	BSD 3 条款新 (或修订) 许可