What is coverage data?
OGC uses the term “coverage” to refer to any data representation that assigns values directly to spatial position. Coverage is a feature that associates positions within a bounded space (its spatiotemporal domain) to feature attribute values (its range). Examples include a raster image, a polygon overlay, or a digital elevation matrix. The spatio-temporal domain of coverage is a set of geometric objects described in terms of direct positions. Commonly used spatio-temporal domains include point sets, grids, collections of closed rectangles, and other collections of geometric objects.
