True Random

The Hotspot descriptions below are without the GPS data, because in 2009 no GPS logger with a weight of less than 500 g can log the actual position once per minute for at minimum one month (a medium log trip e. g. to Aconcagua Mountain) without battery change or charging. So i'm still waiting.
I could measure three hotspots during a regular trip, but there are more.
The hotspots have a radiation with about 99 % gamma rays and therefore the frequency is in the region of several Petahertz. So Wi-Fi with several Gigahertz is not compatible.
Because the Gammasout uses a small tube, it is insensitive and not good enough for searching hotspots, except huge hotspots like the chernobyl reactor, or hotspots with a really dangerously high activity (>1 mSv/h). Therefore i could measure the hotspots of Prypiat below only because the guides pointed at them.

First hotspot

The first hotspot was in front of a school, at a school book. The radiation source seems to be a hot particle some cm in the ground, but without a lead shielding of the geiger mueller tube and triangulation it's not possible to get more details.
Another possibility is using a Gamma camera.
And with a gamma ray spectrometer it's possible to find out which nuclides are in the hot spot.
Because the first hotspot had a dose rate around only 15 µSv/h (and there was not much time for a photo) it's not worth to describe more details.