as many others I would like to contribute radiation data from my Geiger counter. It is located in my garden and it looks like it provides quite reliable data. It is part of my home automation system build around openhab2. It is based on the Geiger counter GK Radmon Monitoring Plus kit ( ESP8266, SBM20 tube, BME280, SDS018 dust sensor). According to Gmaps my house is located in 100m radius of N 52.347144, E10.255060.