Framework data refers to those geospatial data themes identified as the “core” or “base” data layers, upon which all other data layers are structured and integrated for a specific analysis or geographic domain. The framework concept represents the base data elements of a spatial data infrastructure. In addition to content specifications for framework data themes, framework also addresses mechanisms for defining, maintaining, sharing, and accessing framework data. Framework data are generally considered to have widespread usefulness, forming a critical foundation for many applications. Potential benefits of framework data include facilitation of geospatial data production and use, reduction of operating costs, and improved service and decision making.