OpenStreetMap engages local and global mapping communities through activities like mapping parties, education, and crisis mapping. At a local level, mapping communities involve institutions, government agencies, universities, and businesses. Globally, over 1 million users collaborate internationally to create and use open source map data and tools, particularly for crisis response like Cyclone Pam in Vanuatu. Communities are part of an ecosystem that develops, contributes to, and uses open map data.