空间信息移动服务现状及我国发展对策

讨论空间信息移动服务的主要技术体系、关键技术、产业发展方向和我国发展空间信息移动服务的机遇与挑战,概括空间信息移动服务的现状与发展趋势,提出了我国发展空间信息移动服务的四点对策。     

“北京首届空间信息产业论坛”成功召开——改革开放三十年,北京空间信息产业领跑全国

2008年12月18日，在改革开放三十年到来之际，以“空间信息在现代服务业中的融合与发展”为主题的北京首届空间信息产业论坛在北京中苑宾馆成功召开。本届论坛由国家遥感应用工程技术研究中心和北京高技术创业服务中心主办，北京国遥新天地信息技术有限公司和北京星天地信息科技有限公司承办，并得到了中国地理信息系统协会、中国遥感应用协会、北京软件行业协会的大力支持。     

开源促进GIS技术自主创新

在知识经济与经济全球化的时代,地理空间信息是现代社会的战略性信息资源,地理空间信息产业已成为现代知识经济的重要组成部分,开源GIS的发展更加速了地理空间信息技术的自主创新。     

新技术为传统GIS产业带来新机遇

2006年是国家实施“十一五”计划的启动元年。随着国家对空间信息产业的重视和投入力度的增大，以及GIS／遥感等相关技术和理念的普及，中国的空间信息产业市场已呈现加速发展的势头。从年初西部1：5万比例尺地形图空白区测图工程的启动，到11月全国数字化城市管理工作会议在江苏扬州市召开，表明国内信息化建设对空间信息技术的需求日趋旺盛，中国空间信息技术的应用愈加广泛和深入。市场规模明显扩大，中国已成为全球GIS市场增长率最高的国家之一。     

空间数据信息系统研究

空间信息产业的发展与系统目标的实现需要一个坚实的基础空间数据平台,空间数据是一切地理信息应用的基础.城市空间信息来源于城市,城市空间信息基础数据平台将给数字地球、数字城市的发展提供支撑,成为可持续发展的数字工程的框架.叙述了数据空间的内容、含义、特点、结构、采集、集成等技术要点,提出了其在空间数据平台系统在数字城市建设中的应用.     

“数字中国网”的构想与设计

随着空间信息应用深度和广度的扩大,对各类空间信息资源的需求将日益增长。传统的空间信息应用模式越来越难以适应空间信息服务网络化、业务化和产业化的发展趋势。在分析当前对地观测技术发展和空间信息应用需求的基础上,借鉴电子商务平台的模式理念,将交易的理念引入到空间信息资源的开发利用中,提出了建立数字中国网的构想。通过实现数据/信息产品、定制服务、应用系统集成和数字工程实施的业务化运营,盘活空间信息资源、实现空间信息服务的工程化和业务化。同时根据提出的构想,设计并初步实现了基于"B/S+G/S"混合模式的数字中国网的构想方案。     

基于云计算的空间信息服务系统研究*

随着空间信息产业的发展,空间信息服务的需求越来越多,系统的可扩展性、可靠性和可用性的要求越来越高,为此提出了一种基于云计算的空间信息服务系统。系统的设计遵循应用即服务的思想,采用分布式文件系统、分布式数据库、并行编程模型（Map/Reduce）和工作流等技术,支持海量数据存储、资源目录和交换体系以及并行程序处理,可提供从数据到处理功能的一体化服务。最后以植被净初级生产力计算服务为例,对系统设计和关键技术进行了验证。实验证明,本系统具有可行性,能满足空间信息服务的多种需求。     

面向LBS的移动空间信息服务研究

GIS技术、移动终端无线定位技术、空间信息无线传输技术、空间信息移动表现技术的不断发展,为移动空间信息服务的产生和发展提供了新的契机。在分析了移动空间信息服务概念和类型的基础上,提出了移动空间信息服务的体系结构和主要设计思想,最后讨论了实现移动空间信息服务的几个关键技术。     

2008年度空间信息系统软件测评圆满完成，23个软件受到表彰

受科学技术部高新技术发展及产业化司委托,国家遥感中心牵头并联合中国地理信息系统协会、中国环境遥感学会以及中国全球定位系统技术应用协会共同组织实施,完成了2008年度国产地理信息系统、遥感、全球卫星导航定位系统等空间信息系统软件测评（以下简称软件测评）。参加本年度测评的国产空间信息系统软件共48个,其中地理信息系统软件26个,     

空间信息移动技术的发展现状与趋势

讨论空间信息移动技术的主要技术体系、关键技术、应用模式、产业化方向和我国发展空间信息移动技术的机遇与挑战,概括空间信息移动技术的发展现状与趋势,提出了发展我国空间信息移动技术的主要对策。     

The new era for geo-information

Along with the forthcoming of Google Earth, Virtual Earth, the next generation of Internet, Web 2.0, grid computing and smart sensor web, comes the new era for geo-information. In this paper, main features of new geo-information era are discussed. This new era is characterized by these features: serviced users are extended from professionals to all public users, the users are data and information providers as well, geospatial data provided are no longer measurement-by-specification but measurement-on-demand through smart sensor web, and services are transferred from being data-driven to applicationdriven. Such problems as out-of-order issues in geographic data collection and information proliferation, quality issues in geographic information updating, security issues in geographic information services, privacy issues in sharing geographic information and property issues in sharing geographic information, which are brought about by new geo-information era, especially those confronted in geoinformation science and geo-spatial information industry, are analyzed. Then strategies concerning standards, planning, laws, technology and applications are proposed. Supported by the National Basic Research Program of China (Grant No. 2004CB318206)     

地理信息查询语言发展趋势

作者首先分析了空间数据库查询语言的特征,然后总结出当前的主流地理信息查询语言是SQL查询语言及其扩展,最后指出可视化查询语言将是未来地理信息查询语言发展的一大趋势。     

面向地学信息领域垂直搜索引擎设计与实现

垂直搜索引擎是搜索引擎领域的行业化分工,根据地学信息领域的行业特征、整体需求及其工作流程,在Nutch开源搜索引擎平台上添加了"庖丁解牛"中文分词算法、主题相关度评分算法、"主题词管理"选项等技术,建立了基于网络蜘蛛模型的面向地学信息领域的垂直搜索引擎。经过测试及结果比较,该系统相对于通用搜索引擎有明显的优势,使地学信息的定位和查找更加准确。该系统具有良好的扩展性和通用性,对垂直搜索引擎的研究和开发具有一定的借鉴作用。     

Web服务组合中地理信息的集成与应用研究

OpenGIS 组织定义了用于将地理信息的交互与处理服务化的规范,但是按这些规范所构造的服务具有特殊性,难以和普通的 Web 服务进行交互并协同工作。本文通过扩展基于 SOA 架构的 Web 服务组合平台的体系架构,使得普通 Web 服务与处理地理信息的服务能够协调工作,并按符合 OpenGIS 规范的方式实现了在 Web 服务组合中对地理信息的集成与显示,在此基础上又对地理信息的一个重要应用——按位置组织服务进行研究,并探讨了多种服务组织方式间的统一操作接口问题。     

Geocoded information incorporated into urban online services—the approach of the City of Vienna

Decision making in densely populated areas is dependent on local or regional aspects to a very high degree. Therefore it is necessary to merge geo-information fully into the IT-processes of a municipality. So the building-up of a spatial information infrastructure is aimed at a complete integration of geo-data providers and geo-information users in a comprising GI-network. The paper describes the general characteristics of such an infrastructure and how it is established in the on-line services and daily workflows of the City of Vienna.     

Analysis and integration of geo-information to identify granitic intrusions as exploration targets in southeastern Yunnan District, China

Identifying granite intrusions in the southeastern mineral district of Yunnan (China) is an essential task in support of mineral exploration for sustaining Sn mineral resources in the area. That is because the Sn and Cu hydrothermal mineralizations in this district are associated with granite intrusions, as sources of both hydrothermal fluid and heat. In this paper, a new high-pass filter technique based on a singularity analysis was applied to gravity and aeromagnetic data to delineate local anomalies characterizing granite intrusions. A PCA was applied to stream sediment geochemical data of 39 trace elements and compounds to derive a new integrated geochemical variable representing an element association, indicating the presence of granite intrusions. This new integrated geochemical variable is positively correlated with K₂O, Na₂O, Al₂O₃, Zr, Th, U, and Sr and negatively correlated with MgO and Fe₂O₃. To further characterize the granite intrusions, PCA was applied to integrate the local gravity and aeromagnetic anomalies obtained through singularity analysis and the new integrated geochemical variable obtained through PCA. The results show that the presence of outcropping and buried granitic intrusions is indicated by the principal component with positive loadings on the integrated geochemical variable and gravity data singularity and negative loadings on aeromagnetic data singularity. The methodology proposed in this paper is useful and effective for geo-information extraction and for integration of multisource geo-information for predictive modeling in mineral exploration.     

Relationality in geoIT software development: How data structures and organization perform together

Constructivism in geo-information science has emphasized what happens to geo-information technologies (geoIT) after the design stage, when systems and applications are used in real life. Current constructivist views, however, have focused less on other aspects such as software development practices. This paper adopts a similar constructivist epistemology, but looks at how geoIT and people are entangled in the development stages.We discuss the case of the migration of GIS software to Free and Open Source license. This case provides clear empirical evidence of the entanglement of humans and artifacts during the development of GIS technologies. Through an analysis of archived material (such as mailing lists), and of the software code, the paper describes how the integration of a new software (the library Fast Fourier Transformation in the West) was hindered by the different data structures of the original GIS and the new software. The case study we propose shows how actual software development practices may contrast with the well-established rhetoric of technical efficiency of the algorithms. In addition this choice also illustrates the organizational aspects of developing GIS and the different weights that are given to computational resources and organizational resources.     

基于GIS地质灾害预警系统研究

地理信息系统(GIS)技术的快速发展,提供了一种认识、研究地学信息的新方式,也使得地质灾害动态预警成为可能。论文以山西省某市地质气象数据的获取情况为例,研究了基于GIS的地质灾害预警预报技术。     

The Story of the GeoToolKit—An Object-Oriented Geodatabase Kernel System

The quickly increasing number of spatio-temporal applications in fields like environmental monitoring, geology and mobile communication is a new challenge to the development of geodatabases. However, the query functionality of today's geo-information systems is still limited to the thematic attributes of spatial objects and to spatial 2-D objects. This article reports on GeoToolKit, an object-oriented geo-database kernel system developed at Bonn University to support 3-D/4-D geological applications. GeoToolKit is not a GIS-in-a-box package, but rather a library of C ++ classes that allows the incorporation of spatio-temporal functionality within an application. Being a component toolkit, it encourages the development and deployment of re-usable and open software. The history, concepts and implementation of GeoToolKit are discussed in detail. Performance tests underline the practicability of the concepts. Extensions to and experiences with GeoToolKit applications like GeoStore, GeoWeb and WellStore are presented. Finally, we give an outlook on our future research introducing GeoToolKit as a 3-D/4-D database component within a network of distributed and mobile geo-information services.