网络地图服务自适应层次研究     

李伟  陈毓芬 《测绘科学技术学报》2012,(2):131-134,139

针对当前网络地图服务现状,认为在网络地图服务中引入自适应理论与技术是提升地图服务智能水平与服务质量的一个重要途径.在分析地图可视化领域自适应相关研究基础上,立足于自适应环境和主体多元需求的阶段性改变,梳理与客体相应的自适应因素,提出了网络地图服务自适应层次模型.阐明了该模型中5个自适应层次的关键研究内容及其技术要点,进...  相似文献   

利用相似性特征进行 Web服务语义匹配     

陈科  郭建忠  谢明霞  赵长义 《测绘科学技术学报》2012,(2):149-152

通过对传统语义相似性度量方法的分析和比较,利用相似性关系本身所具有的相对性和传递性,选取共同的领域本体作为相似性比较的基准,提出了基于相似性特征的 Web服务语义匹配算法,解决了现有 Web服务语义相似性度量方法中需要外在文本集、无法对相似性进行定量表达以及相似性区分程度不明显等问题.最后,选取德国人工智能研究中心发布的基于 OWL - S的 geography领域服务测试集进行语义相似性度量对比实验,实验结果证明了所提算法的可行性和有效性.  相似文献   

Making Cyberspaces into Cyberplaces     

《The Journal of geography》2012,111(6):253-265

Abstract

This article explores the interplay between geographic concepts and geographers' Web site design. The concepts—place, site, and situation—provide the context for reconsidering current metaphors dominating the rhetoric of cyberspace. Challenging the predominant metaphor of cyberspace as path or highway, we draw on the work of French phenomenologist Merleau-Ponty and on the work of phenomeno-logically oriented geographers to propose the figure/ground structure of cyberplace in contrast to the void of cyberspace. For the absolute freedom of unlimited space we suggest the depth and breadth of world. If geographers succeed at creating Web sites informed by disciplinary concepts, Web site design itself can help to reconceive geographic concepts. Two virtual field-trips offer the opportunity to demonstrate the interaction of a reconceived notion of place and the design of graphical interfaces. The article discovers possibilities for enhancing the value of geographic Web sites. Three design strategies—geographic context, duration, and nonlinearity—are recommended as a result of this investigation.  相似文献   

基于WebGIS的Web服务器日志管理系统设计与实现     

张群;张雯;李飞雪;李满春;陈东 《东北测绘》2013,(4):13-16

WebGIS优势是通过互联网对地理空间数据进行发布和应用,以实现空间数据的共享和相互操作。将WebGIS和富客户端技术引入Web服务器日志管理领域,从总体设计、数据库设计、实现框架等几个方面设计了Web服务器日志管理系统开发框架,并开发了某工业园区信息共享平台日志管理系统。该系统可以高效便捷地实现网络访问数据空间可视化、访问流量在线监控、访问数据统计与分析等功能,为Web服务器运行维护提供科学的决策依据。  相似文献   

Implementation of OGC web map service based on web service     

Jia Wenjue  Chen Yumin  Gong Jianya 《地球空间信息科学学报》2013,16(2):148-152

OGC Web Map Service is one kind of OGC Portrayal Services belongs to OGC Web Service model and it provides multi-platform interoperability of spatial data set. This paper presents a method for implementing OGC Web Map Service based on Web Service technique and introduces the detailed process.  相似文献   

基于Web服务移动拼车系统的设计与实现     

张庆贺  韩勇  张小垒  陈戈 《地理空间信息》2013,11(2):85-87

介绍了一种利用手机应用程序的实时性和Web应用程序的广泛性、便利性开发系统程序,共同提供服务的拼车系统。该系统以Web服务为基础,实现了拼车数据在Web端和手机端的实时共享,使拼车更加便捷,提倡了低碳、环保、节能的生活理念。  相似文献   

基于Web的3维数字社区建设方法与应用研究     

何涛  葛亮  王磊 《测绘与空间地理信息》2013,(12):104-106

提出了一种基于Web的3维数字社区建设方案与技术路线,对3维数据社区关键技术进行了研究,并结合具体应用。本文提出的数字社区平台建设思想,结合了Web计算机技术与3维地理信息系统技术,以期对数字社区平台建设提供有益借鉴。  相似文献   

A modified binary space partitioning tree for geographic information systems     

PETER VAN OOSTEROM 《International journal of geographical information science》2013,27(2):133-146

We present a reactive data structure, that is, a spatial data structure with detail levels. The two properties, spatial organization and detail levels, are the basis for a geographic information system (GIS) with a multi-scale database. A reactive data structure is a novel type of data structure catering to multiple detail levels with rapid responses to spatial queries. It is presented here as a modification of the binary space partitioning tree that includes the levels of detail. This tree is one of the few spatial data structures that does not organize space in a rectangular manner. A prototype system has been implemented. An important result of this implementation is that it shows that binary space partitioning trees of real maps have O(n) storage space complexity in contrast to the theoretical worst case O(n² ), with n the number of line segments in the map.  相似文献   

Integrating GIS and data warehousing in a Web environment: A case study of the US 1880 Census     

R. G. Healey  J. Delve 《International journal of geographical information science》2013,27(6):603-624

While the business intelligence sector, involving data warehouses and online analytical processing (OLAP) technologies, is experiencing strong growth in the IT marketplace, relatively little attention has been devoted to the problem of utilizing such tools in conjunction with GIS. This study contributes to the development of this research area by examining the issues involved in the design and implementation of an integrated data warehouse and GIS system that delivers analytical OLAP and mapping results in real‐time across the Web. The case study chosen utilizes individual records from the US 1880 population census, which have recently been made available by the North Atlantic Population Project. Although historical datasets of this kind present a number of challenges for data warehousing, the results indicate that the integrated approach adopted offers a much more flexible and powerful analytical methodology for this kind of large social science dataset than has hitherto been available.  相似文献   

Community-based production of geographic information using open source software and Web 2.0     

G. Brent Hall  Raymond Chipeniuk  Robert D. Feick  Michael G. Leahy  Vivien Deparday 《International journal of geographical information science》2013,27(5):761-781

This article presents an innovative approach to citizen-led production of Web-based geographic information where new and/or existing digital map features are linked to annotations or commentary and citizens engage in synchronous and/or asynchronous discussion. The article discusses the relationship of the approach to public participation geographic information systems (PPGISs) and the emerging challenges associated with volunteered geographic information. A custom-developed, open source software tool named MapChat is used to facilitate the citizen inputs and discussions. The information generated from applying the approach through a series of community workshops is presented and discussed in light of current issues in PPGIS and volunteered geographic information research.  相似文献