MapDiff is a utility for visualising OpenStreetMap activity:
Each frame represents a daily diff, generated with Osmosis. Changes are displayed as three colours - red for deletion, blue for creation, and green for modification.
MapDiff is invoked with a base map, an input change set, and a location to save the output:
$ mapdiff --map=Map.png --input=2008_01_01.osc --output=2008_01_01.png
The base map must follow the "Google Tile" scheme, i.e., a square mercator projection with a latitude extent of ±85.05112877980659.
The Resources/ directory contains a sample map that fits this size, along
with scripts to automate the building of diff images and to convert them to a movie.
MapDiff is written in D, and can be built with GDC.
- mapdiff 1.0
- Released 2008/03/06
- Initial release