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This video shows all edits made to the OpenStreetMap project in 2011. OpenStreetMap is a free geographic database that anyone can edit; it’s like the wikipedia of mapping data.

This animation shows all additions and modifications of nodes (white flashes) and cumulative edits (purple) in 2011. It gives a good overview of the effort that 1000s of contributors put in to make OpenStreetMap a rich source of mapping data.

This animation has been made by Derick Rethans entirely out of free and open source software. The added data is parsed and rendered by PHP and its extension, and the mapping and animation itself with POV-Ray.