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Building the world’s most out-of-date map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 OpenHistoricalMap is aiming to create the most comprehensive, most out-of-date map of everything that’s existed from Then through Now.

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News and talks

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Turbulent Waters: Showing the Historical Extent and Impact of Natural and Human Activities in OpenHistoricalMap

Jun 8, 2024 · David Jenne

Historic (and prehistoric) changes in water levels, some due to dam building and others resulting from natural processes, have had significant influence on geography. The changes include dam construction, a major dam...

Lowercase history: micromapping the past

Jun 8, 2024 · Minh Nguyễn

History is about far more than empires, wars, and migration. The same attention to detail that makes OpenStreetMap special – that human touch – also makes OpenHistoricalMap stand out in the field...

Event Mapping: new territory for OpenHistoricalMap

Jun 7, 2024 · Richard Welty

Experimentation has started on mapping events in OpenHistoricalMap. Potential subjects include the routes of explorers and their expeditions, and mapping battles and campaigns. We will discuss available resources, static elements (traditional mapping),...

State of the OpenHistoricalMap 2024

Jun 7, 2024 · Jeff Meyer, Minh Nguyễn, and Richard Welty

This session will provide an overview of the health of the OpenHistoricalMap project, as measured by active user growth, data contributed, supporting systems that are in place, as well as by reviewing...

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...