Coverage data

For example, a satellite image derived from remote sensing might record varying degrees of light pollution.

Furthermore, requirements relating to both viewpoints may occur in a single application, typically matching a data-flow: from observation through interpretation, and then elaboration and simulation.

At that time this was a novel concept, extending CAD formats into more spatially aware data that featured linked attributes.

However, ArcInfo coverages had a particular topological approach to ensure completeness and uniqueness, processed using the BUILD and CLEAN commands are 2D planar datasets that maintain topological information, thus a polygon "knows" which segments of its perimeter it shares with adjacent polygons.

], the Coverage model employs indexed binary files to store spatial and attribute data separately as opposed to utilizing a RDBMS.

[5] This has changed with the advent of raster database technology like rasdaman which makes efficient ad hoc filtering and processing feasible.