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 Ma...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.展开更多
This paper proposes a web map system for drawing an arbitrary travel route using a mouse-sensitive following path suggestion. The interaction model of the system allows users to intuitively understand the sequence of ...This paper proposes a web map system for drawing an arbitrary travel route using a mouse-sensitive following path suggestion. The interaction model of the system allows users to intuitively understand the sequence of user actions needed to draw a conceived route and reduces the number of user actions required. Moreover, the system allows users to understand at a glance several drawing alternatives (static suggestion) and also consider a particular drawing alternative (dynamic suggestion) without making any commitment. The proposed architecture of the system reduces the influence caused by communication delay between a map server and a web client by delivering in advance road network data from a map server to a web client. Experimental evaluations on a prototype we developed demonstrated that the proposed system enables users to draw arbitrary routes within noticeably less clicks, in less time, and with less stress than previous systems.展开更多
Web-based geographic information systems have advanced rapidly on the back of web-based technologies,increased bandwidths and access to Digital Earth imagery and functionality.However,these advances are causing its ca...Web-based geographic information systems have advanced rapidly on the back of web-based technologies,increased bandwidths and access to Digital Earth imagery and functionality.However,these advances are causing its capabilities to slowly overtake those of end-users.Additionally,the introduction of non-desktop devices such as smartphones,tablets and netbooks is starting to undo progress made towards standardisation of web-based technology.Large varia-tions in screen sizes,computational power,bandwidth,and operating environ-ments are once again introducing the need to ensure software remains functional across different platforms,standards-compliant or not.These two issues highlight the need for a mechanism to tune content and capability to end-users and their environment,to prevent information and complexity overload in a field already troubled by poor usability,while promoting cross-platform compatibility.This paper proposes the use of adaptivity to accommodate for users from different backgrounds accessing web mapping systems in different technical environments.It describes adaptive profiles aligned to the finite number of states a system can adopt,rather than the limitless range of user or environment characteristics that cannot be adapted to.Each profile consists of a combination of adaptive states comprising functionality,information detail,or technical demands to optimise for individual users or technical environments.展开更多
Web 2.0的出现代表了互联网从信息展示为主的应用向社交、共享以及合作为主的应用发展,这些以用户为中心的技术将改变人们合作的方式以及网络应用的形式。诸如Google Map等能够接纳用户数据并支持用户定制的地理工具的出现,使得GIS(地...Web 2.0的出现代表了互联网从信息展示为主的应用向社交、共享以及合作为主的应用发展,这些以用户为中心的技术将改变人们合作的方式以及网络应用的形式。诸如Google Map等能够接纳用户数据并支持用户定制的地理工具的出现,使得GIS(地理信息系统)应用的构建越来越方便快捷。文中阐述利用Web 2.0中的富互联网应用程序(Rich Internet Application)和mashup技术将国境口岸的疾病监测信息集成在Google Map中,构建国境口岸疾病监测Web GIS系统。该系统实现了在地图上进行国境口岸监测信息的上报、统计、预警,并节约了GIS建设的软件与数据成本。展开更多
In this paper,we detail the design and the implementation of an open source,server-side web mapping framework for the analysis of health data.The frame-work forms part of a larger project,the goal of which is to provi...In this paper,we detail the design and the implementation of an open source,server-side web mapping framework for the analysis of health data.The frame-work forms part of a larger project,the goal of which is to provide an analytical web geographical information system(GIS)that enables health experts to analyse spatial aspects of health data.The aim of the framework is to provide a method for the dynamic and flexible spatial visualisation of health data to facilitate data exploration and analysis.Consequently,a dynamic thematic web mapping technique,an extension to the Open Geospatial Consortium(OGC)web map service standard,was developed.The technique combines a data query,processing technique and styling methodology on the fly to generate a thematic map.The resulting thematic map represents a virtual map layer that enables a user to rapidly visually summarise properties of a data-set.A test web interface was developed to assess the efficacy of the web mapping technique.As the dynamic web mapping method builds on existing OGC web mapping standards,it can be readily integrated with the existing lightweight slippy map web clients and virtual globes.展开更多
文摘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.
文摘This paper proposes a web map system for drawing an arbitrary travel route using a mouse-sensitive following path suggestion. The interaction model of the system allows users to intuitively understand the sequence of user actions needed to draw a conceived route and reduces the number of user actions required. Moreover, the system allows users to understand at a glance several drawing alternatives (static suggestion) and also consider a particular drawing alternative (dynamic suggestion) without making any commitment. The proposed architecture of the system reduces the influence caused by communication delay between a map server and a web client by delivering in advance road network data from a map server to a web client. Experimental evaluations on a prototype we developed demonstrated that the proposed system enables users to draw arbitrary routes within noticeably less clicks, in less time, and with less stress than previous systems.
文摘Web-based geographic information systems have advanced rapidly on the back of web-based technologies,increased bandwidths and access to Digital Earth imagery and functionality.However,these advances are causing its capabilities to slowly overtake those of end-users.Additionally,the introduction of non-desktop devices such as smartphones,tablets and netbooks is starting to undo progress made towards standardisation of web-based technology.Large varia-tions in screen sizes,computational power,bandwidth,and operating environ-ments are once again introducing the need to ensure software remains functional across different platforms,standards-compliant or not.These two issues highlight the need for a mechanism to tune content and capability to end-users and their environment,to prevent information and complexity overload in a field already troubled by poor usability,while promoting cross-platform compatibility.This paper proposes the use of adaptivity to accommodate for users from different backgrounds accessing web mapping systems in different technical environments.It describes adaptive profiles aligned to the finite number of states a system can adopt,rather than the limitless range of user or environment characteristics that cannot be adapted to.Each profile consists of a combination of adaptive states comprising functionality,information detail,or technical demands to optimise for individual users or technical environments.
文摘In this paper,we detail the design and the implementation of an open source,server-side web mapping framework for the analysis of health data.The frame-work forms part of a larger project,the goal of which is to provide an analytical web geographical information system(GIS)that enables health experts to analyse spatial aspects of health data.The aim of the framework is to provide a method for the dynamic and flexible spatial visualisation of health data to facilitate data exploration and analysis.Consequently,a dynamic thematic web mapping technique,an extension to the Open Geospatial Consortium(OGC)web map service standard,was developed.The technique combines a data query,processing technique and styling methodology on the fly to generate a thematic map.The resulting thematic map represents a virtual map layer that enables a user to rapidly visually summarise properties of a data-set.A test web interface was developed to assess the efficacy of the web mapping technique.As the dynamic web mapping method builds on existing OGC web mapping standards,it can be readily integrated with the existing lightweight slippy map web clients and virtual globes.
