On a separate note,

1.
it would be convenient to have this
launch inside a "gpx directory".
Probably just an edit we can play with on the launcher hopefully.

2.
Looking around the .config file, map1`
appears to be set as the default,
which means if someone has a preference to launch a particular map
they might want to set that as the map1 entry.
In restarting,
the previous map used is what is launched on restart.
Nicely done

3.
Looks like the volume buttons handle zoom/unzoom,
but it looks like it needs a wiggle to kick it into play ?

All in all this is an excellent piece of work.
Plays well with gpsrecorder gpx and kml files.