OpenHistoricalMap

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OpenHistoricalMap goes beyond the present, mapping places throughout the world… throughout the ages.
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 October 18:

1748
Under the Treaty of Aix-la-Chapelle, the Duchy of Guastalla is ceded to Infante Philip of Spain, who combines it with the Duchy of Parma and Piacenza.
1812
The ancient Iglesia de La Blanca in Burgos, Spain, is destroyed during the Peninsular War.
1860
Under the Convention of Peking, the Qing dynasty cedes Kowloon, part of Canton prefecture, to Great Britain, which establishes Hongkong.
1921
A post office opens in Uszpirden, Lithuania.
1965
John Golden Park opens in Queens, New York City.
1968
The Waterfront Highway is proposed in Vancouver, British Columbia, but the highway is never built and the proposal would be abandoned in 1973.
1972
A section of Interstate 10 opens in New Orleans.
2001
Ma’ale Rehav’am is founded as an Israeli settlement in the West Bank.


Statistics
  • 2.1M
    dated elements
  • 514k
    buildings
  • 381k
    railroad miles
  • 123
    average age
  • 1939
    average year
  • 1,825
    contributors
News
August 11, 2025
Vespucci adds built-in support for editing OpenHistoricalMap.
April 27, 2025
OSM Building Viewer adds support for rendering an OHM building in 3D.


Events
November 14, 2025 – November 15, 2025
State of the Map Europe in Dundee, Scotland
November 12, 2025 – November 13, 2025
Unicode Technology Workshop in Mountain View, California
October 16, 2025 – October 19, 2025
WikiConference North America in New York City
October 15, 2025 – October 18, 2025
North American Cartographic Information Society Annual Meeting in Louisville, Kentucky


Policies and guidelines