| 摘要: |
| 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. |
| 关键词: 矢量,栅格,数据模型,一体化. |
| DOI： |
| 分类号: |
| 基金项目:本文研究得到国家863重点高科技项目基金资助. |
|
| An Unification Data Model of Vector and Raster |
|
YANG Shu-qiang,CHEN Huo-wang,WANG Feng
|
| Abstract: |
| 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. |
| Key words: Vector, raster, data model, unification. |
