How to get distance and azimuth between points with qml?

ThomasDobrzinski — Sun, 12 Dec 2021 10:51:31 GMT

Hi,

I am totally new in developing apps with the AppStudio and qml, so hopefully the questionis not too easy.

I want to calculate the distance and the azimuth (bearing) from my current (gps)-position to a point on the map.

What i already did:

I added a positionDisplay to my map.

positionDisplay {

                       compass: Compass {

                           id: compass

                           active: true

                           // Create a variable to hold azimuth

                           property double azimuth: 0

                           // Change sensor axis depending on 'userOrientation' property

                           axesOrientationMode: Compass.UserOrientation

                           onReadingChanged: {

                               // Called when a new compass reading is available

                               compass.azimuth = reading.azimuth;

                              //Or better Call it when Reading is available?
                              //geoResult = locationPoint.geodesicDistance(toPoint);

                       positionSource: PositionSource {

                           id: positionSource

                           active: true

                           onPositionChanged: {

                               locationPoint.valid = position.longitudeValid && position.latitudeValid

                               locationPoint.x = position.coordinate.longitude;

                               locationPoint.y = position.coordinate.latitude;

                               geoResult = locationPoint.geodesicDistance(toPoint);

                               locationPointChanged();

                   }

The points are set like this


   property Point locationPoint : Point { 
                property bool valid : false
                spatialReference: SpatialReference {
                    wkid: 4326
                }
        }
            property Location toPoint :Location{
                coordinate {
                    latitude: 55.314835
                    longitude: 8.458156
                }
            }


I thought I could use the GeodesicDistanceResult to get distance and azimuth, but it didn't worked.


GeodesicDistanceResult{ 
                id:geoResult
                }


like in my "onPositionChanged"

 geoResult = locationPoint.geodesicDistance(toPoint)

so what's wrong or how do i have to use it?

Thanks in advance!
Thomas

Re: How to get distance and azimuth between points with qml?

LucasDanzinger — Mon, 21 Mar 2016 17:43:47 GMT

Maybe this will help get you on the right track - RuntimeQtSamples/main.qml at master · ldanzinger/RuntimeQtSamples · GitHub

topic How to get distance and azimuth between points with qml? in ArcGIS AppStudio Questions

How to get distance and azimuth between points with qml?

Re: How to get distance and azimuth between points with qml?