OpenHistoricalMap

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!

Go to the map • Learn more…

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: City limits of San Jose, California, as of March 1968. Right: The same location today.

On this day

Selected establishments and disestablishments on October 17:

1797: Under the Treaty of Campo Formio, various Austrian territories were transferred to France, bringing an end to the Burgundian Circle.
1816: The Gambia Colony and Protectorate is established as part of the British Empire.
1881: In Rio de Janeiro, the Leopoldina Railway's Carangola Line opens between Itaperuna and Aré.
1887: French Indochina is formed from Annam, Tonkin, Cochinchina, and Cambodia.
1918: The Jōzankei Railway begins service in Sapporo, Japan.
1955: In Colorado, Arapahoe County gains 1.8 acres (0.73 ha) after a court orders Denver to de-annex several streets.
1967: The first section of the Northern Motorway opens in Christchurch, New Zealand.
1999: Marechiaro station opens on the Albano–Nettuno line in Anzio, Italy.

Statistics

2.1M
dated elements
514k
buildings
381k
railroad miles
123
average age
1939
average year
1,825
contributors

Source: Overpass API, Overpass API, Planet
October 8, 2025

Historical statistics

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.

Older news

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