The core of this paper is the design and realization of the region gis based on feature model . firstly it introduces the feature model which is one of the space data model in gis area 本文以区域gis的要素模型为着眼点，介绍了空间数据模型的分类，要素模型的特点及其数学基础，设计并实现了基于要素模型的区域gis系统。
This paper introduces the concepts and theory of sde ( spatial data engineer ) , and presents some key technologies , such as the model of sde , the efficiency of sde , data consist of multi - user edit , etc 摘要介绍了空间数据引擎的概念和原理，剖析了空间数据模型、引擎效率、多用户编辑的数据一致性、多数据源支持等空间数据引擎的关键技术。
This paper reviews and introduces the major research progress on spatial tessellation , spatial relation , multi - dimensional data modeling , spatio - temporal and dynamic data modeling , multi - scale data modeling 摘要以地理空间实体及其相互间关系的抽象、表达与组织为主线，从三维、时空、尺度等角度出发，进行了多维动态空间数据模型研究。
Starting from the problem in the spatial data model of webgis nowdays , this paper analysizes and designs spatial data model , and builds a united spatial data model and oriented object expression 论文首先从当前webgis空间数据模型当前普遍存在的问题出发，分析和设计了空间数据模型，建立了数字地球需要的统一数据模型与面向对象表达。
In order to efficiently express 3d objects in the actual world , especially , coal beds , a new method of 3d based on set theory was proposed after analyzing complicated 3d data of coal beds 摘要为了有效地表达现实世界特别是煤矿床的三维空间实体，在分析了复杂煤层三维数据的基础上，基于集合论的数学思想，提出了一种新的抽象的煤矿床空间数据模型。
The system adopts spatial data model based on the vector data model ; topology relation model uses spatial data model combined with spatial data index ; and makes use of relation database to save spatial entity data 本系统采用基于矢量数据模型的空间数据模型；拓扑关系模型采用空间数据模型与空间数据索引结合；采用关系数据库存储空间对象数据。
Furthermore , the author studied spatial data storage model , spatial data displaying , query , optimizing and index of dm3 , and develop the parts on spatial data storage and management under dm3 建立了一种适合dm3的空间数据模型，以此模型为基础，对空间数据库相关的空间数据存储模型、空间数据显示、查询优化、空间索引的使用等关键技术进行了深入研究。
We analyze in detail the difficulties in integration of field - based model and object - based model , and propose an object - oriented 3d gis integrated model . we also discuss the architecture of the integrated model 本文详细分析了基于域和基于对象两种空间数据模型集成的各种问题及相应的解决措施，提出了一种面向对象三维gis集成数据模型，并深入讨论了集成模型的体系结构。
Different from traditional information system , gis has much metadata , so dbms has to manage two kinds data : attribute data and spatial data . the author expatiate the implement of management of gis data . 5 在此部分，论文主要介绍了由专用的数据库管理系统oracle来管理业务属性数据，并讨论了oracle的空间数据模型及其空间数据库的实现，最后提出了空间数据库实现的一种简化方案。
Two kinds of multi - resolution spatial data model are studied in this paper . one is the feature model and hoom model based on dlg data . the other is multi - resolution dem model based on terrain data using the algorithms of self - adaptive triangular regular networks and hierarchical triangular irregular networks 论文主要对两种类型的多分辨率空间数据模型理论和实现技术进行研究，第一类空间数据是数字线划图数据dlg ，第二类是数字高程模型数据dem 。
