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.