diff options
| author | Ivan Solovev <ivan.solovev@qt.io> | 2021-07-28 12:08:19 +0200 |
|---|---|---|
| committer | Qt Cherry-pick Bot <cherrypick_bot@qt-project.org> | 2021-07-28 14:40:51 +0000 |
| commit | decc47815ac89e3952156abbf1276f803667634e (patch) | |
| tree | a054930b77ee885bcd48ace8f1970cb36fc0e94b | |
| parent | 7515e249c5da337e87cb9542a086f1b03af7adc8 (diff) | |
QGeoPositionInfo: extend docs for attributes
Add the description of Position Accuracy - a 3D accuracy value.
Qt does not provide it directly, but it can be calculated based on
horizontal and vertical accuracy values.
Task-number: QTBUG-64694
Change-Id: Ic043b2d3a8198fc3ec77f0c5af1ff83934a47044
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>
(cherry picked from commit 1efdfa7e810e7eb86b2cde3151a6291666dc3e35)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
| -rw-r--r-- | src/positioning/qgeopositioninfo.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/positioning/qgeopositioninfo.cpp b/src/positioning/qgeopositioninfo.cpp index abb672f5..2d50c57a 100644 --- a/src/positioning/qgeopositioninfo.cpp +++ b/src/positioning/qgeopositioninfo.cpp @@ -73,6 +73,14 @@ QT_BEGIN_NAMESPACE \value MagneticVariation The angle between the horizontal component of the magnetic field and true north, in degrees. Also known as magnetic declination. A positive value indicates a clockwise direction from true north and a negative value indicates a counter-clockwise direction. \value HorizontalAccuracy The accuracy of the provided latitude-longitude value, in meters. \value VerticalAccuracy The accuracy of the provided altitude value, in meters. + + NMEA protocol also suggests another type of accuracy - PositionAccuracy, + which is a 3D accuracy value. Qt does not provide a separate attribute for + it. If you need this value, you can calculate it based on the following + formula: + + \c {PositionAccuracy} \sup 2 \c {= HorizontalAccuracy} \sup 2 \c { + + VerticalAccuracy} \sup 2 */ /*! |