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 Great Lakes rail network in 1920. Right: The same location today.

On this day

Selected establishments and disestablishments on May 19:

1890
The Blenheim and Woodstock branch line opens between Kidlington and Woodstock, Oxfordshire.


Statistics
  • 1.8M
    dated elements
  • 449k
    buildings
  • 293k
    railroad miles
  • 130
    average age
  • 1935
    average year
  • 1,670
    contributors
News
April 27, 2025
OSM Building Viewer adds support for rendering an OHM building in 3D.
April 17, 2025
OpenRailwayMap has added a time slider and replaced OpenStreetMap demolished railways with OpenHistoricalMap data.
April 15, 2025
Follow our new Bluesky account.
April 10, 2025
The Nominatim API has moved to a new subdomain for consistency with OpenStreetMap.
February 12, 2025
QLever examples have been updated to reflect an improved data model for members of relations and ways and more metadata.


Events
June 19, 2025 – June 21, 2025
State of the Map U.S. in Boston


Policies and guidelines