System Design Considerations for the Development of an Electronic Statistical Atlas

In the recent history of cartography, atlases deserve a prominent status among cartographic products due to the variety of their thematic content, the rather friendly appearance and their utilization by a wide spectrum of users. Advances in information technology, and more specifically in geographic information systems and digital mapping, have altered the fundamental way of using maps, and thus they have a major impact on every aspect of electronic atlas design and development. Although considerable effort has been made towards the production of electronic atlases, and successful systems are available, there are still a number of factors that must be considered towards the improvement of their design and functional characteristics. This paper elaborates on those factors and suggests a specific approach toward the design and development of electronic atlases, particularly electronic statistical atlases. This approach has been used for the development of the Statistical Atlas of the European Union (STATLAS_EU), which is intended to provide a user-friendly resource for statistical analysis.     

RDF/XML在地学数据Web共享中的应用研究

本文基于W3C推荐的资源描述框架（RDF）,利用RDF/XML语法法规范实现了地学多学科元数据的表达和交换;设计了地学多学科元数据扩展和共存方案;以RDF／XML为中间层,构建了地学数据Web共享的基本框架。研究表明RDF／XML在地学数据Web共享中的应用前景十分广阔。     

浙江省地面气象观测数据A文件资料解读入库方案

A文件是地面气象观测数据文件的简称,由于A文件存储要素方式位的复杂性,直接对A文件资料的查询、统计非常不方便,尤其是需要对不同台站、不同月份的A文件进行查询统计时.通过编写程序将A文件观测资料解读写入XML数据文件和关系型数据库,形成完整的浙江省A文件观测资料数据库.就可以很方便的在此基础上开发相应的查询统计应用软件,就能实现全省任意时段、区域A文件观测资料的查询和统计,为A文件观测资料数据的二次开发应用奠定了基础.     

XML在气象业务中的开发和应用

XML是一种扩展标记语言,能够实现简单的数据存储,现已成为网络应用开发通用的数据接口文件.主要介绍XML语言结构特点,并通过在公共气象服务业务平台开发中的应用实例阐述了XML语言的生成方式和调用方法等.     

遥感影像数据库引擎设计与实现

在参考国内外现有资料的基础上,提出一个遥感影像元数据标准草案,并利用该元数据标准对遥感影像数据进行描述:用大型关系数据库对遥感影像数据及其元数据进行一体化管理,实现遥感影像数据的结构化存储;使用XML对遥感影像元数据进行描述,便于实现影像元数据的网上查询与检索,并最终实现遥感影像数据的网络共享。     

基于XML的海洋环境基础数据格式转换的研究

针对当前海洋科学研究、海洋预报、海洋环境保护等工作中遇到的海洋环境基础数据格式不一致的问题,通过对数据语义、语法、结构的分析,建立数据之间格式转换模型,在此基础上提出基于可扩展标记语言(XML)转换模板的数据格式转换体系,并以台站观测温盐数据为例,设计编写程序成功实现数据间的格式转换。     

基于XML Web Service的网络地理信息系统的构建

网络地理信息系统WebGIS是一种更为开放的、符合分布式GIS应用趋势的解决方案,文中论述了Web-GIS采用的技术及面临问题,阐述了XML Web Service这种全新的动态分布式计算模式的实现技术。并提出以Supermap IS.NET提供的服务式GIS平台,构建基于XML Web Service体系的开放式WebGIS设计方案,说明了系统方案的优越性和可行性。     

LUNARINFO: A Data Archiving and Retrieving System for the Circumlunar Explorer Based on XML/Web Services

It is essential to build a modern information management system to store and manage data of our circumlunar explorer in order to realize the scientific objectives. It is difficult for an information system based on traditional distributed technology to communicate information and work together among heterogeneous systems in order to meet the new requirement of Internet development. XML and Web Services, because of their open standards and self-containing properties, have changed the mode of information organization and data management. Now they can provide a good solution for building an open, extendable, and compatible information management system, and facilitate interchanging and transferring of data among heterogeneous systems. On the basis of the three-tiered browse/server architectures and the Oracle 9i Database as an information storage platform, we have designed and implemented a data archiving and retrieval system for the circumlunar explorer-LUNARINFO. We have also     

实现基于JDO的电子政务系统持久层

JDO为对象持久性提供了第一个标准化的、完全面向对象的方法。JDO不但实现了透明的对象存储，而且提供到任何数据底层的存储功能，使得应用可移植性更强。完备的数据存储功能，易于维护的程序代码及开放的规范标准，都使JDO成为一种优秀的对象持久性机制。     

基于GML 3.0的大地测量数据建模

分析了GML 3.0对空间数据建模的支持,讨论了基于GML 3.0的大地测量数据建模,包括大地测量坐标参考系、大地测量观测值的模型描述,给出了基于GML 3.0的大地测量对象建模实例。