File:Fukushima2011july18a.jpg

Map of contamination attributed to the Fukushima disaster, image from http://www.nnistar.com/gmap/fukushima.html

state for July 18, 2011, and the scale.

The scale looks strange. For example,

the dense yellow may correspond to 0.2 $\mu$Sv/h, see the bottom row, as well as 2 $\mu$Sv/h, the upper row.

the blue may correspond to 0.6 $\mu$Sv/h, see the bottom row, as well as 0.1 $\mu$Sv/h, the upper row.

If the authorities cannot draw the unambiguous map of contamination, there is no reason to expect that they can handle a nuclear power plant in a safe way. While they have problem with assigning colors to the levels, the four levels (for example 0.1, 1, 10 and 100 $\mu$Sv/h) would be better solution, than the irregular mixture of the tens of colors.