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: The Spanish kingdoms of Mexico in 1640. Right: The same location today.

On this day

Selected establishments and disestablishments on May 6:

1828: The United States signs a treaty with the Choctaw Indians that establishes the eastern line of the Choctaw Session (the present Arkansas–Oklahoma state line) and affirms Choctaw control of the area west of the line. As a result, Indian Territory gains territory from four counties of Arkansas Territory.
1861: Arkansas secedes from the United States and joins the Confederacy.
1913: The Osaka City Tram system’s Utsubohonmachi Line begins service.
1923: In Toulouse, a memorial is dedicated to casualties of war from the Saint-Aubin and Dupuy districts.
1994: The Channel Tunnel opens, connecting England and France across the Strait of Dover.
1998: In Kazakhstan, Akmola is renamed Astana.
2009: A U-turn lane opens along the C-5 road in Manila.

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