OpenStreetMap US

Building the world’s most out-of-date map

OpenStreetMap for Roman roads? Middle Kingdom cities? 1890s railways? OpenHistoricalMap is aiming to create the most comprehensive, most out-of-date map of everything that’s existed from Then through Now.

Meet the team

News and talks

See all posts

OpenHistoricalMap: What's new in the world of old?

Feb 21, 2024 · Jeff Meyer, Minh Nguyễn, and Richard Welty

There’s a lot of new happenings in the home of old mapping, OpenHistoricalMap. This mappy hour will cover a few topics, including: The recent Newberry Library Atlas of Historical County Boundaries import...

Too many tabs: leveraging sister projects to stay organized

Jan 19, 2024 · Minh Nguyễn

We’ve all been there: fixing one little thing leads to a rabbit hole of research. Learn to escape the hole and Keep Mapping Fun by contributing in tandem to OpenStreetMap, OpenHistoricalMap, Wikidata,...

OpenHistoricalMap: Doing History

Jun 11, 2023 · Richard Welty

History is harder than it looks. While there may be one true set of facts, almost immediately after an event, facts start getting lost or confused. Research is harder than just looking...

Turbocharging Local Historical Societies with OpenHistoricalMap

Jun 11, 2023 · Jeff Meyer

Odds are, your local community has at least one, if not several historical societies, and OHM has all the tools to help them get off the ground with building old maps of...

Mapping Old Richmond with OldInsuranceMaps & OpenHistoricalMap

Jun 10, 2023 · Jeff Meyer

Let’s leave Richmond better than we found it by putting this city’s long history on OpenHistoricalMap. Whether you’re into mapping buildings, railroads, businesses, or something else, let’s see how much progress we...