New visual data mining study 'Parking Violations in Helsinki' has been added to the Visual Data Mining Gallery! The text is currently only in finnish because the work participates the Apps4Finland 2014 competion, but heatmaps are the same for every language...

Heatmaps visualize the density of parking violations in Helsinki during Jan-Jul 2014 based on open data publised by City of Helsinki. The example shown above compares summer and winter periods so that regions marked with colors ranging from red to yellow have more parking violations during summer time.