Multi chart example - Florence open data

The screenshot above shows a part of the iXmaps visualization of a data set as a first result of the 'Censimento della popolazione del 2011' published by the town of  Florence on their open data portal. The data contains information about the state of conservation of buildings aggregated by the geographic area of census sections.
The iXmaps visualization  shows these numbers as one donut chart per section.

Data source: http://opendata.comune.fi.it/statistica_territorio/dataset_0279.html
Licence: CC (Creative Commons) BY 3.0 IT