【作者】 张文；

【导师】 周云轩；

【作者基本信息】 华东师范大学 ， 自然地理学， 2005， 硕士

【摘要】 地理数据建模的基本任务是,针对所研究的空间现象或问题描述GIS的空间数据组织,设计GIS的空间数据库模式,这包括定义地理实体及其相互间关系,确定数据或目标及其关系,设计在计算机中的物理组织、存储路径和数据结构等。 随着地理信息系统的蓬勃发展,地理数据库本身产生了许多急需解决的问题,如地理数据模型如何准确有效地表达地理现象,空间数据库建模能否采用新的计算机技术实现标准化、自动化等。对这些问题认识的准确与否,决定着地理信息系统的建设水平和应用层次。 本文在第三代空间数据模型Geodatabase的基础上,结合河口海岸信息系统地理数据库的建立,对地理数据库建设中地理数据模型的应用、建模方法与过程展开研究。主要取得以下结论和成果: (1)针对地理信息系统界在空间数据模型研究中分类混乱,概念混淆的问题,指出利用面向对象思想结合关系数据库组织地理数据是第三代空间数据模型的发展趋势。 (2)在Geodatabase数据模型的基础上,进行了基于UML和Case工具的空间数据库建模实践工作,指出了现有解决方案的缺点和不足。 (3)讨论了河口海岸数据环境下的地理数据模型,发展了包括海洋要素、地表水系、元数据和行政区划的河口海岸地理数据库模型。 (4)建立了河口海岸地理信息系统地理数据库。更多还原

【Abstract】 Aiming at spatial phenomena or problems studied, the essential tasks of geographical data modeling are the description of spatial data organization and spatial database model design, which includes definition of geographical entity and the relationship, determination of data or objects and their topological relations, physical organization of the date, storage route and data structure,Geographical database itself has a number of problems which is badly in need of solution, for examples, accurate and effective expression of geographical phenomena with a geo-data model, the standardization and automation of spatial database modeling by adoption of new computer technology. Solutions to these questions are vital to the quality level and its applications of the geographical information systems.On the basis of Geodatabase, the third generation data model, this thesis carries out a study on geo-data model design and modeling in the geo-database establishment in association with the set-up of database for the estuarine and coastal geographic information system (ECGIS). Some principal results are given below.(1) Aiming at the confusion existing in spatial data model classification and conceptual uncleamess in the field of GIS, it is concluded that the geo-data organization through combination of object-oriented principle and relational database is the trend of the third generation data model development.(2) On the basis of Geodatabase model, the establishment of the ECGIS database was carried out with the use of UML and Case tool. The shortcoming and deficiency of the existing database modeling solution were discussed.(3) This thesis also elaborated the geographical data model for dealing with estuary and coast data. The estuarine and coastal geographical database model is developed, which includes marine elements, terrestrial surface watersystem, metedata and administrative division.(4) The database framework for ECGIS is finally established.更多还原