Orient-Entity Spatial Data Model
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摘要: 空间数据模型是地理信息系统(GIS) 研究的基础内容.为适应新一代大型GIS的数据量大, 拓扑关系复杂, 数据种类多等特点, 提出了一种新型GIS数据模型---面向地理实体的空间数据模型.它以实体为基本表达对象, 具有较强的空间和语义表现力, 支持语义表达和转换, 便于实现等优点.从空间数据管理, 概念数据模型等方面详细地介绍了该种数据模型.实践表明, 采用该数据模型, 系统对真实世界的实体表现力将大大增强, 数据组织更加合理.
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关键词:
- GIS /
- 空间数据模型 /
- 面向实体的空间数据模型
Abstract: The spatial data model is basic to the research of GIS. New generation large-scale GIS has high levels of data, complex topology relations and many data categories. In order to meet these requirements, we propose a new kind of GIS data model: the orient-entity spatial data model. An entity is the basic, representative object in this model. The advantages are a strong ability for representation and semantics, expression and transformation of semantics, and realization with ease. This paper introduces the data model from the sides of the spatial data management and the concept data model. A system with this model can strengthen its ability of representation to real world objects, and rationalizing data organization.-
Key words:
- GIS /
- spatial data model /
- orient-entity spatial data model
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