矢量和栅格一体化的数据模型

An Unification Data Model of Vector and Raster

本文提出的矢量和栅格一体化的数据模型将零维、一维和二维空间划分为不规则的子空间，并建立了这些子空间之间的空间关系和层次结构．地物可以表示为这些子空间的集合，地物之间的空间关系可以由组成它们的子空间推导．这一模型同时具有矢量和栅格数据模型的优点，支持矢量和栅格数据模型所具有的功能．

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.