Web环境下SVG地图浏览器的设计与实现

SVG是近年来发展起来的基于XML的用于描述矢量图形、图像的标准规范，该规范的制定对网上矢量地图数据的共享具有十分重要的意义，基于SVG的矢量地图十分有利于地理空间数据的传播。文中首先分析了目前Web环境下矢量地图发布存在的问题，之后介绍了SVG的有关情况，最后基于Adobe的SVG Vie—wer2．0设计并实现了一个SVG地图浏览器，着重研究了3个问题，即矢量地图数据在SVG文档中的组织与编码，地图浏览器界面的设计以及若干地图操作功能的实现。     

北京市政务地理空间信息资源共享服务平台建设实践

从北京市政务地理空间信息资源共享服务平台（以下简称＂平台＂）的建设背景,总体框架,关键技术及创新点、服务现状及成果,经济社会效益等方面介绍了该平台的建设实践。     

地理信息公共服务平台地理实体数据建模研究

围绕国家地理信息公共服务平台在线地理信息服务的需求,在分析国内外相关成果的基础上,提出了面向实体的数据建模思路,设计了地理实体数据模型,能够方便地实现地理信息与社会、经济、自然资源等专题信息的挂接,并有效解决多比例尺实体目标的一致性维护问题.     

基于中间件的遥感影像数据共享技术研究

针对遥感影像共享服务的应用需求,提出基于中间件技术的影像数据共享方法;设计基于中间件技术的影像数据服务模式。通过实验实现支持多用户并发访问的服务原型,验证基于中间件技术的影像数据服务方法的可行性并给出进一步研究的方向。     

地图数据库研究

本文在分析地图数据特征的基础上,针对如何提高地图空间查询效率这一难题,从多种地图索引方法中选择了Ｒ＋＿树索引方法,实现了Ｒ＋＿树索引的算法,最后给出了一个包括地图数据存储和索引、查询功能的地图数据库实例。     

Volcanic hazard communication using maps: an evaluation of their effectiveness

Hazard maps are considered essential tools in the communication of volcanic risk between scientists, the local authorities and the public. This study investigates the efficacy of such maps for the volcanic island of Montserrat in the West Indies using both quantitative and qualitative research techniques. Normal plan view maps, which have been used on the island over the last 10 years of the crisis, are evaluated against specially produced three-dimensional (3D) maps and perspective photographs. Thirty-two demographically representative respondents of mixed backgrounds, sex, education and location were interviewed and asked to complete a range of tasks and identification on the maps and photographs. The overall results show that ordinary people have problems interpreting their environment as a mapped representation. We found respondents’ ability to locate and orientate themselves as well as convey information relating to volcanic hazards was improved when using aerial photographs rather than traditional plan view contour maps. There was a slight improvement in the use of the 3D maps, especially in terms of topographic recognition. However, the most striking increase in effectiveness was found with the perspective photographs, which enabled people to identify features and their orientation much more readily. For Montserrat it appears that well labelled aerial and perspective photographs are the most effective geo-spatial method of communicating volcanic risks.

地球空间信息科学在湖南国土资源可持续发展中的应用前景雏议

可持续发展是跨世纪多学科综合的重大学科领域,而地球空间信息科学是空间信息科学发展的重要成果。本文在阐述了地球空间信息科学的特点及发展现状,国土资源可持续发展的内涵和特点之后,简要探讨了地球空间信息科学在湖南国土资源可持续发展中的应用前景。     

Pivotal principles for digital earth development in the twenty-first century

ABSTRACT

Reductionist thinking will no longer suffice to address contemporary, complex challenges that defy sectoral, national, or disciplinary boundaries. Furthermore, lessons learned from the past cannot be confidently used to predict outcomes or guide future actions. The authors propose that the confluence of a number of technology and social disruptors presents a pivotal moment in history to enable real time, accelerated, and integrated action that can adequately support a ‘future earth’ through transformational solutions. Building on more than a decade of dialogues hosted by the International Society for Digital Earth (ISDE), and evolving a briefing note presented to delegates of Pivotal 2015, the paper presents an emergent context for collectively addressing spatial information, sustainable development, and good governance through three guiding principles for enabling prosperous living in the twenty-first century. These are: (1) open data, (2) real-world context, and (3) informed visualization for decision support. The paper synthesizes an interdisciplinary dialogue to create a credible and positive future vision of collaborative and transparent action for the betterment of humanity and planet. It is intended that these Pivotal Principles can be used as an elegant framework for action toward the Digital Earth vision, across local, regional, and international communities and organizations.     

地球空间信息科学之刍议

地球空间信息科学是地球科学、空间科学和信息科学交叉渗透发展的结果。它由地球空间信息理论、地球空间信息技术和地球空间信息应用等三个部分组成。它的主要研究方向是从空间信息流的角度揭示和认识地球系统，特别是地球表层系统的现象和过程，地球各圈层相互作用的时空特征。地球空间信息科学在国家和区域的可持续发展及资源、环境和人口的协调发展中具有广阔的应用前景。     

空间数据工程理论框架研究

随着地理信息系统应用的深入发展，如何晚好高效地组织和利用地理空间数据成为空间信息科学研究的一项重要内容，为了从工程实施的角度来更好地创建，管理和使用空间数据，笔者提出了空间数据工程的概念，该文对空间数据工程以及相关概念进行了定义，同时描述了空间数据工程元模型和相关的两个子元模型，从而建立了其理论框架，最后，描述了空间数据工程所要解决的问题以及其研究内容。