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- Concept of Spatial Database Model and Its Architecture Research 空间数据库模型概念与结构研究
- spatial database model 空间数据库模型
- Relational OLAP uses the relational database model. 关系 OLAP就利用了关系数据库模型。
- Pavement management system was described in detail from the establishment of database, attribute database, spatial database, evaluation model of pavement performance and so on. 从数据库构建、属性数据库和空间数据库、路面使用性能评价模型等方面比较详细地介绍了路面管理系统。
- Selectivity Estimation is the base of spatial database query optimizer. 选择性估计是设计空间数据库查询优化器的基础。
- So, basing on the research of CORBA model and distributed spatial database, integrating computer supported cooperative work (CSCW), the paper adopts four tiers architectural structure to construct the distributed GIS. 本文在深入研究CORBA规范和计算机支持协同工作(CSCW)的基础上,采用四层的体系结构构建分布式GIS。
- Jing Ning, born in 1963.Professor and Ph.D. Supervisor.His main research interests include GIS and spatial database. 景宁,1963年生,教授,博士生导师,主要研究方向为地理信息系统、空间数据库。
- Spatial database for railway is the foundation of Railway Geographic Information System (RGIS). 摘要铁路空间数据库是铁路地理信息系统(RGIS)的基础。
- The database model failed to validate. You must fix the error(s) listed in the output window before you can proceed. 对该数据库模型进行校验时失败。必须更正输出窗口中列出的错误才能继续。
- It can handle spatial data and spot any-shape clusters in a noised spatial database by dividing them into clusters with high enough density. 该算法将具有足够高密度的区域划分为簇,并可以在带有“噪声”的空间数据库中发现任意形状的聚类。
- SDM is different from the classical data mining in that spatial database have its own characters compared with relational database (RDB). 空间数据有许多不同于非空间数据的特性,使得空间数据挖掘与一般数据挖掘相比亦有其鲜明的特征。
- But mapping class hierarchies to a relational database model might prove somewhat difficult. 但是,把类的层次结构映射到关系数据库模型,可能会比较困难。
- This paper classify a series of methods on spatial database index, and introduce the QR-tree index structure with very large spatial database. 在综述现有空间数据库索引技术的基础上,提出了一种面向大型空间数据库的QR-树索引方法。
- The workflow of the system is described.The database model of the system is defined. 提出该系统的体系结构,描述其工作流程。
- The data storage is based on RDS, design spatial database under the direction of object oriented concept and realize object storage. 数据的存储是以现有的关系数据库为基础,以面向对象的思想为指导来设计空间数据库,实现对象的存储。
- However there are some problem in the content and system of spatial database course and the standard teaching mode has not been formed. 但由于种种原因,空间数据库课程在课程体系、课程内容、教学模式等方面仍然存在许多问题和不足。
- How to establish the effective database model,speed up the database creation process,is the key to database application procedure implementation. 如何建立有效的数据库模型,加快数据库建立过程,是数据库应用程序实施的关键。
- ArcGIS extends ArcView by providing multi-userediting, advanced analysis, Internet services, and highperformance spatial database services. 在 ArcView 中,无论用view,table,chart,layout或script哪一种方式来对数据进行检索、查询、统计分析或生成图,都是通过对专题(theme),特征(feature,又作要素),属性(attribute),字段(field)进行操作来实现。
- With the penetration of geographical information system in people's lives,NL-oriented spatial database query has been noticed. 随着地理信息系统深入应用于人们的日常生活,面向自然语言的空间数据库查询的研究越来越被人们重视。
- When you try to update a Database Model Diagram that is connected to an Oracle database, the Database Refresh Wizard disappears and Visio 2003 appears to stop responding (hangs). 当您尝试更新数据库模型图连接到Oracle数据库,数据库刷新向导消失并且Visio 2003似乎停止响应(挂起)。