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…

Use

Go to the main map and navigate to a place and time of interest using the time slider. Share the map to spread the word about our project. Explore the many ways you can reuse OpenHistoricalMap in your own storytelling and software projects.

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. Please report any issues and send us your ideas on GitHub or our forum.

Then and now

From OpenHistoricalMap's community projects:

Left: Tenochtitlan (present-day Mexico City) in 1520. Right: The same location today.

On this day

Selected establishments and disestablishments on May 7:

1662: Hampshire County is created from the towns of Springfield, Northampton, Hadley, and all territory within 30 miles (48 km), effectively covering the entire western part of the Massachusetts Bay Colony.
1822: A new St Pancras Church is dedicated in St Pancras, London.
1888: Kennedytown is annexed to the City of Victoria in British Hong Kong.
1916: An equestrian monument to Giuseppe Missori is dedicated in Milan.
1917: The Main South Line's Emu Flat Platform is closed in New South Wales.
1946: Prądnik is renamed Prudnik in southern Poland.
2001: The Hamburger Leuchtturm in Cuxhaven, Germany, is taken out of commission.
2004: SportRack Automotive opens an auto parts manufacturing plant in Greenwood, Mississippi.
2020: A section of the Sasshō Line between Hokkaidō-Iryōdaigaku and Shin-Totsukawa is permanently closed, having ended service weeks earlier due to the COVID-19 pandemic.

Statistics

3.2M
dated elements
718k
buildings
479k
railroad miles
100
average age
1957
average year
2,077
contributors

Source: Overpass API, Overpass API, Planet
May 1, 2026

Historical statistics

News

April 16, 2026: The official vector tilesets are now available as TileJSON.
April 15, 2026: Our tagging pages more consistently link to other OHM tagging pages instead of often conflicting OSM tagging pages.
April 14, 2026: The tile server has migrated from Tegola to Martin for improved reliability and performance.
April 1, 2026: OpenHistoricalMap Quality and Coverage Stats is a new dashboard for tracking common errors in OHM data.
February 20, 2026: JOSM’s Changeset Viewer plugin adds support for OHMCha.

Older news

Events

June 11, 2026 – June 13, 2026: State of the Map U.S. in Madison, Wisconsin
June 16, 2026 – June 19, 2026: 14th Symposium on Mexican Geography Instruction in Morelia, Michoacán, Mexico
October 27, 2026 – October 29, 2026: State of the Map LatAm in Mexico City, Mexico