Pachube, probably the leading platform for the 'Internet of Things', is providing access to the feeds produced by Japanese Geiger counters registered with them.
Using this data Japan Geigermap has produced a Google Map. The map uses markers that show at a glance the Geiger counter reading. The markers are all colour-coded to show how the reading measures against the average public space Geiger reading for Japan.
- Japan Radiation Maximum by Prefecture - a radiation readings map using data from System for Prediction of Environment Emergency Dose Information (SPEEDI)
- RDTN.org Japanese Radiation Levels - another map showing Pachube radiation feeds
- Greenpeace Map of Radiation Measurements - Google Map of radiation levels in Japan taken by Greenpeace radiation experts