An Unification Data Model of Vector and Raster
Yang Shu · 1998
A unification data model of vector and raster UNM is proposed in this paper. UNM divides the 0 , 1 and 2 dimension space into irregular sub spaces. Relationships among these sub spaces are explicitly built and these sub spaces are organized as hierarchy. Features on the map are expressed as sets of some of these sub spaces. Relationships among features can be inferred and calculated through their sub spaces. UNM supports those analysed functions of both vector and raster structures.