Crowdsourcing

A method of collecting data, information, or contributions from a large number of people, typically via the internet, rather than relying on a single authoritative source. In accessibility contexts, crowdsourcing is used to gather information about the accessibility of physical spaces, transit systems, pathways, and facilities that is not available from official sources. Projects like Wheelmap (wheelchair accessibility of venues), Project Sidewalk (sidewalk accessibility), and AccessMap (pedestrian route planning) rely on community contributions to build comprehensive accessibility datasets. While crowdsourcing can scale data collection rapidly and capture real-world conditions, challenges include data quality, coverage gaps in less-populated areas, and sustainability of contributor engagement.