第四个是统一空间数据模型。
空间数据模型建立的目的是反映现实世界。
The aim of establishing spatial data model is to reflect the real world.
空间数据模型是地理信息系统设计的核心和基础。
Spatial data model is the core and base of three dimensional geographic information system design.
空间数据模型是关于现实世界中空间实体及其相互间联系的概念。
Spatial data model is based on the principle of spatial entities and relationship between mutual.
空间数据模型的类型：基于对象(要素)的模型；网络模型；场模型。
The type of spatial data model: the model based on object (element); network model; field model.
本文主要介绍了当前社会中常用的几种GIS空间数据模型的模型结构、模型内容以及相关应用等。
This paper describes the model structure, model content and related applications of several commonly used GIS spatial data model of the current society.
当今的GIS系统的空间数据模型，主要反映地图制图领域的点、线、面对象管理与操作的几何知识。
However, the spatial data model of main GIS systems only reflect knowledge of management and manipulation objects in field of cartography, such as point, line and poly geometry objects.
利用图解建模分析方法建立一套沟壑密度提取分析空间数据模型，对沟壑密度的快速提取提供了一套全新的解决方案。
It built a spatial data model of getting ravine density with the method of illustrate modeling analysis, which provided the fire-new solution for extracting ravine density fleetly.
开展了空间数据建模研究，在对防震减灾空间数据进行分析的基础上，构建出基于GML的城市防震减灾空间数据模型。
Research the modeling of spatial data. Based on the analysis of urban earthquake disaster reduction spatial data, the GML based earthquake disaster reduction spatial data model is built.
空间数据本质上是分布的，目前对集中式空间数据模型进行了大量的研究，而在分布式空间数据的研究方面尚处于起步阶段。
Spatial data is distributed essentially. There are much more researches in integrated spatial data model but fewer in distributed spatial data.
通过研究地质剖面相关数据模型，地质图和钻孔数据的融合模型，建立地质剖面绘制空间数据库。
By researching into relevant data model of geological section and integrated data model of geological map and bores, this paper establishes the spatial database of drawing geological section.
然后根据空间数据的基本概念和特征，利用面向对象的整体数据模型，分析了空间数据的组织方法和存储方式。
Then based on the basic concepts and features of spatial data, we analyze the organization and storage of spatial data by using the object-oriented holistic GIS data model.
采用空间数据特征比较、时域聚类、相关性分析，综合利用配电网络GIS数据模型和计算机技术对配电网络进行深入的研究。
It adopts space data characteristic compare, cluster analysis and correlation analysis, and synthetically utilizes GIS data model and the technology of computer to analyze the distribution network.
设计了一种基于区域和基于对象数据模型的新型空间数据库，该数据库具有处理多种数据源的能力，提供应用接口，具有较高的灵活性。
A new spatial database based on region and object data model is designed. The database could dispose many data sources. It provides application interfaces and has some flexibility.
该解决方案通过建立统一的数据模型，使用元数据与多数据库系统实现了对分布的异构的空间数据的统一访问请求服务。
Based on the unified data modeling, this resolution realizes the uniform request service to distributed heterogeneous spatial data by metadata and multi-database system.
本文讨论电子政务中基于XML的空间数据交换格式的设计目标、遵循原则、数据模型和矢量数据交换格式中的关键点。
This paper discusses the designed target, followed rules, data models and key points about spatial data exchange format which is based XML and will be used in electronic government.
同时，详细地给出了应用此数据模型所建立的活断层探测项目信息系统空间数据库的库结构表。
At the same time, database structure table of the active fault surveying project information system is implemented in detail according to the application of professional data models.
时间标记在实体和元组级上，空间数据采用非拓扑数据模型。
Finally, the time is signed on entity and record, and non-topological data model is adopted to organize spatial data.
因此，设计并创建空间数据库数据模型显得尤为重要。
Therefore, it is especially important to design and establish the data model for spatial database.
空间数据库是GIS的核心与关键，而数据模型是空间数据库的前提与基础。
The spatial database is both the core and the key to GIS while the data model is the premise and the foundation for a spatial database.
空间数据库是GIS的核心与关键，而数据模型是空间数据库的前提与基础。
The spatial database is both the core and the key to GIS while the data model is the premise and the foundation for a spatial database.
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