about open historical maps creating a map of everything that has existed, open history mapping openhistoricalmap.org with examples of peoples mapping from roman times to 18th century to 20th century in various different places

1. Tim Waters
Geomob July 2015
“Chippy” @tim_waters tim@geothings.net

2. What it isn't (quite)
Historical Objects in OSM

3. What is it? (The logo is a hint)

4. OpenHistoricalMap.org
Most modest mapping project EVER!
Everything that has ever existed
World's most out of date map.

5. OSM Stack
Separate Server
Separate Database
Planet
Overpass API
http://overpass.openhistoricalmap.org

6. Examples

7. Hunterston Scotland 19C

8. Hunterston Scotland Now

9. Saeby – Denmark 18C

10. Saeby – Denmark Now

11. Roman Roads

12. Roman Mainz

13. WWI Trenches, Artillery positions etc

14. Paris 19C

15. Snows Infected Pump

16. Snows Infected Pump

17. in OHM

18. Burning Man 2008/9

19. OHM OSM
20C Treasure Island - SF Bay

20. Manhattan
1854

21. How to add stuff to OHM

22. A very old garmin

23. Imports
Archive from OSM
Tracing from Historical Maps

24. WikiMedia Commons - Wikimaps

25. Wikimaps

29. Editing
● Tags – normal OSM ones
● start_date end_date
– YYYY / YYYY-MM-DD
● Note of source map would be nice

30. Simple?
● Rabbit hole
● Cart before horse?
● Gregorian dates.
● Vagueness / fuzzy

31. imho
● OSM way -
– good enough is better than perfect.
● Contributors not historical GIS “experts”
● Do whatever and let the renderers sort it out!

32. Future
● More Map layers
● Timesliders everywhere!
● Vector tiles
● Better tracing tools
OpenHistoricalMap.org
#ohm on irc.oftc.net
https://lists.openstreetmap.org/listinfo/historic
https://github.com/openhistoricalmap/
“Chippy” @tim_waters tim@geothings.net