OpenHistoricalMap
(Redirected from Hosm)

No community is too small, no story too obscure to add to this map.
Everyone has something to contribute, including you!
Contribute
To contribute to OpenHistoricalMap, go to the main map, zoom in to a place of interest, and click the “Edit” button. If you are familiar with editing OpenStreetMap, the OpenHistoricalMap editing experience is very similar. See the tagging guidelines for information on a few changes we’ve made to accommodate the time dimension.
We also maintain several software projects to facilitate map contributions and data reuse. Please report any issues and send us your ideas on GitHub or our forum.
Then and now
From OpenHistoricalMap's community projects:
Left: The Choongwan district of the City of Victoria in Colonial Hong Kong as of 1800. Right: The same location today.
On this day
Selected establishments and disestablishments on August 13:
- 762
- Rheinbach is first attested as a settlement in the Holy Roman Empire.
- 1607
- The Popham Colony is founded by British colonists in present-day Maine.
- 1859
- Colorado City is incorporated as a town in Kansas Territory, in what is now Colorado Springs, Colorado.
- 1898
- Wait-a-while station closes along the Narrandera Tocumwal line in New South Wales.
- 1919
- Pleasant Ridge is incorporated as a village in Michigan.
- 1951
- The kibbutz of Gonen is founded in Israel.
- 1968
- The final section of the Meon Valley Railway closes in Hampshire, England, after 65 years in service.
- 1988
- The Palace of Auburn Hills opens in Michigan.
Statistics
- 2M
dated elements - 491k
buildings - 350k
railroad miles - 126
average age - 1937
average year - 1,765
contributors
- Source: Overpass API, Overpass API, Planet
- August 4, 2025
News
- April 27, 2025
- OSM Building Viewer adds support for rendering an OHM building in 3D.
- April 17, 2025
- OpenRailwayMap has added a time slider and replaced OpenStreetMap demolished railways with OpenHistoricalMap data.
- April 15, 2025
- Follow our new Bluesky account.
- April 10, 2025
- The Nominatim API has moved to a new subdomain for consistency with OpenStreetMap.
Events
- October 3, 2025 – October 5, 2025
- State of the Map in Manila
- September 4, 2025 – September 6, 2025
- State of the Map Latam in Medellín
Policies and guidelines
Tagging
Copyright
Code of conduct
Good practice (draft)
Land acknowledgment (draft)
Resources
Connect
Forum & Chat
GitHub
OSMUS Slack#openhistoricalmap
Discord#openhistoricalmap
Mastodon
Bluesky
Facebook
Mailing list