The map displays Nuts3 demographic population totals.
Source=Regiomap CDROM (EUROSTAT)
Comments
Total population for the Nuts3 regions are used to constrain the neural
network predictions. This map illustrates the size of the spatial interpolation
problem.
Since for each Nuts3 zone the value in this layer will be the same at first
it may be hard to appreciate the inclusion of this layer at first but it
does make sense.