topic Re: LocationChanged without altitude in Qt Maps SDK Questions

LocationChanged without altitude

Kai_Wellmann — Sun, 12 Aug 2018 13:59:40 GMT

I have written a small app with qt and arcgis 100.3. When the gps information changes the slot LocationChanged is called. I thought that I would get the altitude from Location.position.z. But I always get 0 for the altitude.

What do I have to do to get the actual altitude?

void FlightMap::locationChanged(Esri::ArcGISRuntime::Location location)
{

Point pos=location.position();
x=pos.x();
y=pos.y();
z=pos.z();

}

Re: LocationChanged without altitude

LucasDanzinger — Mon, 13 Aug 2018 14:52:56 GMT

What signal are you connecting to for this slot?

Re: LocationChanged without altitude

Kai_Wellmann — Mon, 13 Aug 2018 15:07:29 GMT

connect(m_MapView->locationDisplay(),SIGNAL(locationChanged(Esri::ArcGISRuntime::Location)),this,SLOT(locationChanged(Esri::ArcGISRuntime::Location)));

Re: LocationChanged without altitude

LucasDanzinger — Mon, 13 Aug 2018 21:50:15 GMT

Hi Kai-

The LocationDisplay is the view component for Qt's QGeoPositionInfoSource. Can you try creating a QGeoPositionInfoSource and listening to it's positionUpdated signal? QGeoPositionInfoSource Class | Qt Positioning 5.11

I'm wondering if the data that is coming in only has X and Y but no Z.

Re: LocationChanged without altitude

Kai_Wellmann — Wed, 15 Aug 2018 16:41:01 GMT

Thank you very much. It is now working. I have tried the positionUpdate Signal and I now get the altitude.

Is this a bug in ArcGIS?

Re: LocationChanged without altitude

LucasDanzinger — Mon, 20 Aug 2018 19:00:40 GMT

Kai - so the results are that you get z values when using positionUpdated but not on the locationChanged signal? If so, then this sounds like a bug in ArcGIS Runtime.