OpenStreetMap

OpenStreetMap (OSM) is a collaborative project to create a free, editable map of the world. It was founded in 2004 by Steve Coast, then a student at University College London, in response to the restrictive licensing of UK Ordnance Survey data. The OpenStreetMap Foundation, established in April 2006, supports the infrastructure and governance. Data is licensed under the Open Database License (ODbL), making it a foundational input for routing engines, geocoders, navigation apps, and humanitarian mapping efforts. By the mid-2020s OSM had more than 10 million registered accounts, a database of over 10 billion nodes, and roughly 2.25 million users who have made at least one contribution. Active monthly contributors number in the low hundreds of thousands, illustrating the steep participation pyramid typical of user-generated content platforms. Research on dense urban areas like London has found that fewer than 10% of contributors produce around 95% of edits, a textbook expression of Pareto distribution contribution skew. The contributor base has also shifted over time from individual hobbyists toward corporate editors employed by Facebook, Amazon, Microsoft, Apple, and others who use OSM downstream. OSM is widely cited in the knowledge commons literature as a successful sustained example of crowdsourced infrastructure. It powers a large share of non-Google mapping use cases — including Apple Maps base data, Wikipedia map embeds, Strava heatmaps, and the Humanitarian OpenStreetMap Team's disaster-response mapping — and serves as one of the clearest practical examples of open data producing measurable economic value while continuing to grapple with classical free-rider problem dynamics.