Journal ArticleDOI
Performance‐improving techniques in web‐based GIS
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Several major potential performance problems with WebGIS are identified and several possible techniques to improve the performance are discussed, which include the use of pyramids and hash indices on the server side to handle large images and clustering and multithreading techniques.Abstract:
WebGIS (also known as web‐based GIS and Internet GIS) denotes a type of Geographic Information System (GIS), whose client is implemented in a Web browser. WebGISs have been developed and used extensively in real‐world applications. However, when such a complex web‐based system involves the dissemination of large volumes of data and/or massive user interactions, its performance can become an issue. In this paper, we first identify several major potential performance problems with WebGIS. Then, we discuss several possible techniques to improve the performance. These techniques include the use of pyramids and hash indices on the server side to handle large images. To resolve server‐side conflicts originating from concurrent massive access and user interactions, we suggest clustering and multithreading techniques. Multithreading is also used to break down the long sequential, layer‐based data access to concurrent data access on the client side. Caching is suggested as a means to enhance concurrent data access...read more
Citations
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Patent
Geographic information system
TL;DR: Disclosed is a geographic information system which comprises a multithreading client and a multathreading server cluster that includes at least one user interface, at least two client coordinator, map data, and at least three server-side spatial managers.
Journal ArticleDOI
Using spatial principles to optimize distributed computing for enabling the physical science discoveries.
TL;DR: This paper illustrates through three research examples how spatial computing could enable data intensive science with efficient data/services search, access, and utilization, facilitate physical science studies with enabling high-performance computing capabilities, and empower scientists with multidimensional visualization tools to understand observations and simulations.
Journal ArticleDOI
TeraGrid GIScience Gateway: Bridging cyberinfrastructure and GIScience
Shaowen Wang,Yan Liu +1 more
TL;DR: A holistic framework that bridges CI and GIScience by integrating CI capabilities to empower GIS science research and education and establish generic DGIP services supported by CI is presented.
Journal ArticleDOI
Virtual database: Spatial analysis in a Web-based data management system for distributed ecological data
Marcel Frehner,Martin Brändli +1 more
TL;DR: The conceptual design and implementation of the Virtual Database is described as an integrated environmental and landscape information system which supports corresponding techniques and methods and confirms the strategy of enforcing openness and modularity for reasons of extendibility and maintainability.
Journal ArticleDOI
Service chaining architectures for applications implementing distributed geographic information processing
TL;DR: This paper introduces a basic architecture and building blocks for building DGIP applications based on service chains, and investigates the issues arising from the composition of OGC services into such service chains.
References
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