Summary

Description

This FEMA Framework Basemap dataset comprises the seven FGDC themes of geospatial data that are used by most GIS applications: cadastral, geodetic control, governmental unit, transportation, general structures, hydrography (water areas & lines), and orthoimagery. The vector data include an encoding of the geographic extent of the features and a minimal number of attributes needed to identify and describe the features. (Source: Circular A16, p. 13) Also included is a digital orthographic imagery dataset. Digital orthographic imagery datasets contain georeferenced images of the Earth's surface, collected by a sensor in which object displacement has been removed for sensor distortions and orientation, and terrain relief. Digital orthoimages have the geometric characteristics of a map, and image qualities of a photograph.