2. Relevance of Historical Data
What did the map look
like two years ago?
Who was involved in
editing object X / region Y?
What exactly happened
in changeset Z?
5. • nodes
• ways
• relations
each of those have a version and a
timestamp, among other things
6. each of those have a version and a
• nodes timestamp, among other things
• ways
• relations
So in theory it’s possible to recreate
the full history of all objects in
OpenStreetMap
19. Also, the data is not readily accessible
Full history dump is 451GB of XML,
containing 1.7 billion node versions, 170
million way versions, and
4.5 million relation versions.