Android Question GPS question : altitude data 1

[klaus]

As an answer to to this GPS question : altitude data thread.
As the problem is device and or manufacturer specific, I would do it that way:
Use the GPS NMEA sentence.
If the GGA sentence is available use the altitude from there.
If the GGA sentence is not available use the altitude from the Location in Location_Change.

 

[emexes]

If the GGA sentence is not available use the altitude from the Location in Location_Change.

If DOM85 is up to it, I'd still like to try confirm that the NMEA altitude is different to the Location_Change altitude, and if so: how much different, whether the VDOP indications are any good, and perhaps even why they are different.

 

[emexes]

This is more a note-to-self of two apps that might be useful/interesting for GNSS-related stuff:

https://play.google.com/store/apps/details?id=com.galfins.gnss_compare

https://developer.android.com/guide/topics/sensors/gnss