Extended FRAG-BASE schema-matching method for multi-version open GIS Web services retrieval

The OGC Web Service (OWS) schemas have the characteristics of a complex element structure, are distributed and large scale, have differences in element naming, and are available in different versions. Applying conventional matching approaches may lead to not only poor quality, but also bad performance. In this article, the OWS schema file decomposition, fragment presentation, fragment identification, fragment element match, and combination of match results are developed based on the extended FRAG-BASE (fragment-based) schema-matching method. Different versions of Web Feature Service (WFS) and Web Coverage Service (WCS) schema-matching experiments show that the average recall of the extended FRAG-BASE matching for the schemas is above 80%, the average precision reaches 90%, the average overall achieves 85%, and the matching efficiency increases by 50% as compared with that of the COMA and CONTEXT matcher. The multi-version WFS retrieval under the Antarctic Spatial Data Infrastructure (AntSDI) data service environment demonstrates the feasibility and superiority of the extended FRAG-BASE method.     

The convergence of GIS and social media: challenges for GIScience

It is hard to believe that 10 years have passed since we wrote our guest editorial for IJGIS (Sui and Goodchild 2001 Sui, D.Z. and Goodchild, M.F. 2001. Are GIS becoming new media?. International Journal of Geographical Information Science, 15(5): 387–390. [Taylor & Francis Online], [Web of Science ®] , [Google Scholar]). Using the nascent evidence that emerged in the late 1990s, we speculated back in 2001 that geographic information systems (GIS) were rapidly becoming part of the mass media. On the basis of the proposition of GIS as media, we were able to link GIScience with theories in media studies such as Marshall McLuhan's law of the media, which considers modern media as modifiable perceptive extensions of human thought (Sui and Goodchild 2003 Sui, D.Z. and Goodchild, M.F. 2003. A tetradic analysis of GIS and society using McLuhan's law of media. Canadian Geographers, 47(1): 5–17. [Crossref], [Web of Science ®] , [Google Scholar]). Remarkable conceptual and technological advances in GIS have been made during the past 10 years. The goal of this review is to provide an update on the ‘GIS as media’ argument we made 10 years ago and to discuss the new challenges for GIScience posed by the growing convergence of GIS and social media.     

基于Web服务移动拼车系统的设计与实现

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。     

基于Web的3维数字社区建设方法与应用研究

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。     

基于WebGIS的Web服务器日志管理系统设计与实现

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。     

Implementation of OGC web map service based on web service

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.     

MAPGIS7-IMS SOA平台的二次开发相关技术与应用

通过对武汉中地数码公司推出的新一代MAPGIS7-IMS SOA平台功能进行了充分研究基础上进行了二次开发。详细介绍了该平台二次开发应用到的主要技术方法,包括Web Service、Ajax技术、HTML语言、CSS样表、JAVAScript脚本语言、DOM模型、VML语言、XML语言、JSP技术和数据库技术等,并且应用这些技术方法在MAPGIS7-IMS SOA平台的基础上二次开发出了青藏高原1:25万区域地质空间数据库管理系统,给出了该系统开发的示例。     

地理信息网络服务的发展研究

随着体系结构、软件层次和自身需求的变化,GIS逐步发展为地理信息网络服务并得到迅速的推广。从标准化、语义化和3维化的角度总结了当前地理信息服务的发展状态,并指出下一代地理信息网络服务必然是基于以上三者的能够实现主动服务和统一多维服务的新一代地理信息服务。     

导航空间变化信息网络搜索与关联匹配

目前全国大部分地区的导航电子地图基本已经建立,面临的最大问题在于对数据的维护和更新。数据更新首先需要发现信息,通过互联网发现一些与导航相关的变化信息是当前应用中很重要的手段之一。本文阐述了一个新的思路将搜索引擎的上下文匹配技术和数据挖掘的关联匹配技术相结合,力图在网络中搜索一些与导航相关的信息,然后根据关联匹配方法智能地寻找最可能的导航数据。给出了其中用到的关键技术和流程,分析了该方法的可行性,为变化信息的智能发现提供新的思路。     

Modest Maps的Flash网络地图发布与应用

本文分析了Adobe Flash技术在网络地图发布前端技术上的优势和应用现状,选择开源Flash地图组件Modest Maps作为开发工具,在其上添加了一些组件模块,以"5.12地震信息显示"为示例,实现了基于Modest Maps的Falsh网络地图发布和简单的空间分析.