OpenStreetMap US

A simple-sounding challenge - running every street in a city - has a surprisingly complex definition. What counts as a street? What defines a city? OpenStreetMap’s data reflects the world’s messiness, from paths to freeways and boundary schemes for many different definitions of place. This talk explores how StreetFerret interpreted OSM data for pedestrian challenges, covering key tagging practices, boundary selection, and edge cases that challenge our understanding of how the world is organized.

Speaker

Brian Sperlongano

Brian is a map hobbyist from North Kingstown, Rhode Island. He is an avid runner and hiker and enjoys mapping trails, protected areas, land cover and boundaries. His hobby projects include OpenStreetMap Americana, a public domain American-themed community map style, and StreetFerret, a tool for runners trying to run every street in their city.

Next up in State of the Map US

Previous talk
Improving POI Accuracy with Crowdsourced Geographic Poses

Jun 21, 2025 · Sean Gorman

Mapping POIs accurately can be challenging at scale especially to include entrances. Often POIs in OSM aren’t aligned well to buildings or other features. Using smartphones and increasingly smart glasses it is...