MapDiffMapDiff is a utility for visualising OpenStreetMap activity: Map data © OpenStreetMap and contributors, CC-BY-SAEach frame represents a daily diff, generated with Osmosis. Changes are displayed as three colours - red for deletion, blue for creation, and green for modification. Using MapDiffMapDiff 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. Scripts to automate the building of diff images, and to convert them to a movie, can be found in the Resources directory. Building MapDiff |