1.A term commonly used to indicate a data set pertaining to a single theme. For example, an GIS software IDRISI image consisting only of vegetation type codes could be referred to as a vegetation coverage._x000D_
2. A digital version of a map forming the basic unit of vector data storage in ArcInfo. A coverage stores geographic features as primary features (such as arcs, nodes, polygons, and label points) and secondary features (such as tics, map extent, links, and annotation). Associated feature attribute tables describe and store attributes of the geographic features._x000D_
3. A set of thematically associated data considered as a unit. A coverage usually represents a single theme such as soils, streams, roads, or land use._x000D_
4.A coverage is also known as a layer