基于地理实体的面向对象矢量模型设计

Design of Object-Oriented Vector Model Based on Geo-entity

空间数据模型是GIS实现地理空间数据组织、表达、分析、处理和应用的基础。针对基于要素的地理实体矢量描述方法的不足,从地理空间信息一体化管理角度,提出面向对象矢量模型(OOVM),探讨模型体系结构、空间对象的描述方法和空间数据管理模式。该模型利用面向对象的技术,将地理实体抽象为不同的空间对象,并将各空间对象的标识符、属性与方法封装在一起,便于网络环境下地理空间信息的存储和分布式管理。以公司信息管理为例,设计了基于OOVM的分布式空间数据组织过程,为空间数据库的建设和数据共享提供新的方法和思路。

Spatial data model lays a foundation for the spatial data to organize, express, analyze,process and apply. By analyzing the shortage of spatial vector description methods on factor, object--oriented vector model（OOVM）is put forward on the view of incorporate management, and model structure, describing method and managing model of spatial object are discussed. In order to manage spatial information in network environment, the model describes spatial information as spatial object whose ID, attribute,method are encapsulated. Taking company information management as an example, the paper designs organizing process of distributed spacial data on OOVM. The researches above provide a new way for construction and sharing of the spatial data.