| 摘要: |
| GIS(geographicinformationsystem)中的数据可以分为3种类型:几何数据、地理数据和图形显示数据.本文提出的面向对象3级数据模型对这3种数据进行抽象划分,用面向对象的模型描述它们及其之间的关系,并以此作为OOGDB(object-orientedseosraphicdatabase)的数据模型. |
| 关键词: GIS(地理信息系统) 地图数据库 面向对象 3级数据模型 |
| DOI: |
| 分类号: |
| 基金项目:本文研究得到国家自然科学基金和国家863高科技项目基金资助. |
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| OBJECT-ORIENTED THREE-LEVELED DATA MODEL |
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YANG Shuqiang,CHEN Huowang,WANG Feng
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| Abstract: |
| GIS (geographic infortnation system) data can be divided into three sorts: geometric data, geographic data and graphic data. TLDM proposed in this paper describes these three sorts of data and their relationships with object-oriented model. TLDM is used as the data model of OOGDB implemented. |
| Key words: GIS(geographic information system) geographic database object-oriented three-leveled data model |