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Precise positioning of scientific instruments on an undersea cabled observatory is crucial for successful data collection. The majority of researchers for NEPTUNE Canada's 800km cabled ocean observatory are geographically diverse, and it is both expensive and time-consuming to be physically present during instrument deployment. We have developed an economical, scalable web application that allows...
In December 2009, after years of planning, preparations and extensive infrastructure deployment, the world's first regional-scale underwater ocean observatory was open for business. NEPTUNE Canada opened its instrument network and data archive to free and open access by anyone willing to register for an account. Thus, we have embarked on a journey to transform our observatory into an online platform...
The distribution of real-time GIS (Geographic Information System) data among users is now more important than ever as it becomes increasingly affordable and important for scientific and government agencies to monitor environmental phenomena in real-time. A growing number of sensor networks are being deployed all over the world, but there is a lack of solutions for their effective monitoring. Increasingly,...
A pilot web application for collaborative georeferencing of Slovenian works of literature was developed. Problems in georeferencing in general and georeferencing works of literature are discussed. The pilot system can be a model for establishing web sites for georeferencing literature for different languages. The application is based on Google Maps and implemented using PHP, JavaScript and MySQL....
In this paper we present work in progress on a system for exploring and geo-referencing scanned historical maps based on collaborative user annotations. We discuss the feature set of our current implementation and identify use cases for our system. Furthermore, we place our work in the larger context of an ??open historical GIS??: we explain our view of such a system as a platform for capturing, aggregating,...
"E-science" refers to the use advanced computing technologies to support computationally intensive and data intensive application. This paper is organized as follows. Section 2 simply describes the motivation of our work. In section 3, we present the architecture of gas network SIG based on data grid. Section 4 describes the key technologies of implementation of gas network SIG in details,...
Rapid evolutions in Earth Information, network, visualization and virtual world technologies create opportunities for a new era of information systems and Internet applications. These technologies' advances enable new capabilities for creation of dynamic contents, visualization of multiple and higher dimensions, distributed collaboration and cognition, immersive participant and interaction, and high...
This paper analyzes deficiencies of load-balancing technologies in the current webgis and discusses the necessity and feasibility to solve load-balancing in webgis through server farms. A new distributed dynamic scheduling model based on server farms is given. A webgis load-balancing algorithm based on collaborative task clustering is proposed. The new algorithm divides the collaborative computing...
Based on our proposed semantics-based service-oriented model, we are building a large-scale sensor grid infrastructure that can seamlessly integrate heterogeneous sensor resources from different projects distributed across a wide geographical area. This model has several important features. First, it connects heterogeneous sensor resources via the Internet to automatically collect and aggregate sensor...
The principles and technologies of computer supported cooperative work (CSCW) are increasingly integrated in many areas to support distributed collaborative production, especially with the rapid growth of the Internet and broadband network technologies. This paper summarizes the results of research and development towards Internet-based support of collaborative GIS data production, and discusses key...
Highly complex problems are usually solved by a team of experts and decision making that involves uncertain data is challenging for human decision makers. Collaborative Decision Making (CDM) is an important human activity and it has many practical applications in society, economy, management and engineering, etc. Researchers are faced with new challenges in research on theory and methods of Computer...
We have developed a Web 2.0 thin client visualization framework called GeoBoosttrade. Our framework focuses on geospatial visualization and using scalable vector graphics (SVG), AJAX, RSS and GeoRSS we have built a complete thin client component set. Our component set provides a rich user experience that is completely browser based. It includes maps, standard business charts, graphs, and time-oriented...
The increasing use of the World Wide Web give rise to an incessant flow of new information. An example is the collaborative web portal developed at the University of Colombo School of Computing. It allows the generation of a large amount of spatially referenced, domain un-restricted information through community input. Some of this information is redundant, some erroneous, and some plainly malicious...
Recently a new class of applications has emerged that uses AJAX and other Web programming techniques to provide a rich user experience in a Web browser. This class of applications is being called Web 2.0 and includes Google maps and Google suggest. To experiment with this approach, we have developed a Web 2.0 thin client collaborative visualization framework called GeoBoosttrade that uses scalable...
There are two architectures by which the collaboration may be achieved: the client/server architecture and the peer-to-peer architecture. This paper presents a hybrid computer supported collaboration and visualization system that is designed and implemented using software engineering, Internet and geospatial technologies. The system uses the client/server and the peer-to-peer architectures to allow...
Web-based system for spatial data co-edit is a CoGIS system, and also a WebGIS application system. This paper studies the technical schema for GML-based WebGIS application system used J2EE systematic framework. A geography markup language (GML) and J2EE based WebGIS model is provided. A task-group management mechanism for CoGIS is designed. Meanwhile, a control system for spatial data co-edit is provided...
The GIS Web services provide a new efficient solution to assemble the GIS functions into a variety of ITS applications dynamically. This paper presents the system architecture design for Web service based uniform GIS transportation information platform. The GIS Web services are designed to provide the hosted spatial data and GIS functionality for the different customized ITS application systems to...
Virtual Geographic Environment (VGE), or Geographic Virtual Environment (GeoVE) is considered to have the potential to extend the power of geographic information visualization methods. As the increasing development of computer network and Internet technologies, Distributed VGE (DVGE) has been developed to support multi-users to participate and share the same virtual geographic workspace. Nowadays,...
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