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Greater Austin flood risk data from the Digital Flood Insurance Rate Map (DFIRM) Database. It classifies areas by 1-percent, 0.2-percent, and 4-percent annual chance flood events, derived from Federal Emergency Management Agency studies and maps. The data is georeferenced using UTM projection for mapping at a 1:12,000 scale.
License is not specified; users should verify terms of use with the City of Austin. Data is provided in multiple formats (JSON, RDF, CSV, XML), requiring compatible tools for processing.