Using Topological Relationships to Inform a Data Integration Process   总被引：2，自引：0，他引：2  

Sue Hope  Allison Kealy 《Transactions in GIS》2008,12(2):267-283

When spatial datasets are overlaid, corresponding features do not always coincide. This may be a result of the datasets having differing quality characteristics, being captured at different scales or perhaps being in different projections or datums. Data integration methods have been developed to bring such datasets into alignment. Although these methods attempt to maintain topological relationships within each dataset, spatial relationships between features in different datasets are generally not considered. The preservation of inter‐dataset topology is a research area of considerable current interest. This research addresses the preservation of topology within a data integration process. It describes the functional models established to represent a number of spatial relationships as observation equations. These are used to provide additional information concerning the relative positions of features. Since many topological relationships are best modelled as inequalities, an algorithm is developed to accommodate such relationships. The method, based on least squares with inequalities (LSI), is tested on simulated and real datasets. Results are presented to illustrate the optimal positioning solutions determined using all of the available information. In addition, updated quality parameters are provided at the level of the individual coordinate, enabling communication of local variation in the resultant quality of the integrated datasets.  相似文献   

The Potential of Maps APIs for Internet GIS Applications   总被引：2，自引：0，他引：2  

T Edwin Chow 《Transactions in GIS》2008,12(2):179-191

Since the launching of Maps Application Programming Interfaces (APIs) in 2005, many web developers, including geographers and non‐geographers, applauded the freely adaptable tools and used them to spawn numerous Internet applications. The success of the Maps APIs is largely attributable to its no‐cost policy, the availability of global data coverage, dynamic navigation, query capability, and ease of implementation. Despite its versatility in dynamic exploration of geographic data online, the existing Maps APIs lack Geographic Information System (GIS) functionalities compared to other Internet Mapping Services. The goal of this research was to review the potential of the Maps APIs for Internet GIS applications. This research employed the Google Maps API and developed a web prototype that disseminates spatial information of urban sprawl in Mundy Township, Michigan. The results revealed that both vector and raster data could be effectively represented by using the Maps API. Moreover, the Geographic Markup Language (GML) approach illustrated great potential for developing Internet GIS solutions around open specifications. This research suggested several potential solutions to expand the spectrum of GIS operations of the Maps APIs by incorporating the XML‐related technology and extending the JavaScript library.  相似文献   

基于实例的GIS数据库模式匹配方法     

王育红  陈军 《武汉大学学报(信息科学版)》2008,33(1):46-50

针对空间数据库的特点,提出了一种改进的基于实例的层次式模式匹配方法,并解决了实体对应关系的自动建立、要素类相似性计算、属性相似性计算等问题.最后,通过实验验证了该方法的有效性.  相似文献   

Spatial Information Management Based on Web Services     

LI Ke  DU Weiguo  YOU Xiong 《地理空间信息》2008,6(5)

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GIS技术在旅游业中的应用——兼谈旅游地理信息系统及其研究进展与展望   总被引：1，自引：0，他引：1  

刘德辉 《测绘与空间地理信息》2008,31(1):90-92

本文对地理信息系统的组成与功能做了简单的概述,在此基础上介绍了GIS在旅游业发展中的主要作用及应用现状,并就旅游地理信息系统的结构与功能及其研究进展和发展趋势做了探讨。  相似文献   

GIS内涵的发展     

黄杏元  黄平 《测绘与空间地理信息》2008,31(1):58-59

根据GIS30多年的发展历程,总结了GIS的三个主要发展阶段及其内涵特点,说明了GISystem、GIScience和GIService的主要研究内容,最后提出了基于GIS内涵的三点初步认识。  相似文献   

构建基于GIS的房产管理     

闫晓光 《测绘与空间地理信息》2008,31(2):67-70

阐述了基于GIS房产管理的关键是建立统一的数据分类与编码标准,核心是建立房屋的空间地理属性信息、自然属性信息、社会人文属性信息的链接,基础是建立房产地理信息数据库。并提出了建立房产地理信息数据库的方法、设计思路和方式。  相似文献   

基于GIS的油田数字化管道的实现   总被引：1，自引：0，他引：1  

魏波  汤军 《测绘与空间地理信息》2008,31(4)

全国油田都在进行一场"数字油田"的革命,而数字化管道又是其中的一个重要环节.本文与油田实际相结合,基于MAPGIS进行二次开发,论述了数字化管道实现的基本理论.  相似文献   

新型单人智能测绘系统（Opiss）     

曹立  张现礼  吴文坛  王伟 《测绘与空间地理信息》2008,31(3)

单人智能测绘系统主要由野外用加固型便携式计算机、高精度GPS接收机、专业软件组成,可以实现单个测量员承担全流程测量作业,高效地进行成图与更新。系统集成创新了现代测绘技术手段,其精度适用于各种不同比例尺地图的测绘与更新,成为信息化测绘体系中的现代测绘技术装备之一。  相似文献   

Plan of the Integration Urban Cadastral Management Information System     

ZHANG Shi-quan  ZHANG Li-chao  ZHANG Zhen 《测绘科学技术学报》2008,25(6)

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