El Microscopio del Voto
Vizzuality have a history of producing some of the most interesting and beautiful Google Maps applications. Their latest effort for the Spanish broadcaster RTVE is up their with the best of them.
The map presents the 2011 Spanish electoral results in the context of historical electoral results and a vast range of demographic indicators. Using the map you can view electoral results since 1987 and discover how the electoral and socio-economic landscape of Spain has evolved over the last few decades.
The map allows you to visualise 15 datasets at 3 different administrative levels over more than 20 years. All the data is visualised on the map using colour coded custom tiles and the result is a great looking map that presents a huge amount of data via a user friendly interface.