OpenStreetMap US

We’ve finally gotten around to updating OHM with a variety of enhancements. This sessions will cover both (a) the tech upgrades & tradeoffs we’ve made to support a time slider and other time-dependent features, and (b) some content highlights.


More info


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 OpenHistoricalMap is aiming to create the most comprehensive, most out-of-date map of everything that’s existed from Then through Now.

Next up in State of the Map US

Previous talk

From The Inside Out: Building a City Vacancy Portal

Sep 8, 2019 · Jonathan Leek

The City of Saint Louis has a wealth of data concerning vacant properties. Unfortunately, like many cities, it also has a data management problem. Data regarding vacant parcels is fractured, spread across...