topic Display device location offline mode.. in Qt Maps SDK Questions

Display device location offline mode..

Girishchandra_Yendargaye — Tue, 12 Mar 2019 11:38:36 GMT

Hello Team,

Can you please suggest correct way to display and track device location in offline map...

Thanks,

Re: Display device location offline mode..

LucasDanzinger — Thu, 14 Mar 2019 14:53:14 GMT

LocationDisplay works offline. Here is an example - arcgis-runtime-samples-qt/ArcGISRuntimeSDKQt_CppSamples/Maps/DisplayDeviceLocation at master · Esri/arcgis-runtime-sampl…

Re: Display device location offline mode..

Girishchandra_Yendargaye — Mon, 18 Mar 2019 04:22:21 GMT

This example uses m_mapView->locationDisplay()->setPositionSource(QGeoPositionInfoSource::createDefaultSource(this));

Which is accessing my network and picking up location..

But what if I do not have Internet...And I want to load from file

Re: Display device location offline mode..

LucasDanzinger — Wed, 20 Mar 2019 16:13:01 GMT

Just to be clear, the GPS receiver should not require the internet to function. Many of our Esri apps work completely offline and use LocationDisplay.

With that said, QGeoPositionInfoSource has a subclass that takes in a NMEA source, which could be set to a file - QNmeaPositionInfoSource Class | Qt Positioning 5.12.2

c++ - Parsing *.nmea file with QNmeaPositionInfoSource class returns timeout. - Stack Overflow

Also, you can subclass QGeoPositionInfoSource to take in any type of file. For example, we did this with GPX files for an example app - dynamic-situational-awareness-qt/GPXLocationSimulator.h at master · Esri/dynamic-situational-awareness-qt · GitHub