Hi,
long time ago I used a separate GPS logger / GPS logger smartphone app so I could add coordinates to photos from various cameras or even from smartphone (you usually do not want to have all your photos geotagged and then you simply forget to switch it on when needed).
There used to be a .NET app to convert Safecast bGeigie Nano data to GPX needed by apps like Showfoto:
or Geosetter:
(started with Geosetter but after issues with maps moved to ShowFoto and the advantage for me is also a native app for Linux).
However, the old .NET app did not work with CzechRad data so here is a brand new one:
which (I hope) works fine.
Feel free to use / test...
regards
Jan