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 African continent in 1925. Right: The same location today.

On this day

Selected establishments and disestablishments on June 28:

1834: Michigan Territory gains unorganized federal territory west of the Mississippi River, including present-day Iowa and parts of Minnesota and North and South Dakota.
1919: Under the Treaty of Versailles, Kamerun is divided into British Cameroon and French Cameroon, while German South West Africa came under South African administration.
1940: The Bukovina, Bessarabia, and Hertsa regions of Romania are occupied by the Soviet Union.
1957: The Will Rogers Turnpike opens for traffic in Oklahoma.
1997: Line 1 of the Guangzhou Metro opens in Guangzhou.
2003: Line 2 of the Guangzhou Metro opens in Guangzhou.

Statistics

3.3M
dated elements
732k
buildings
567k
railroad miles
99
average age
1957
average year
2,112
contributors

Source: Overpass API, Overpass API, Planet
June 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.