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Enabling P2P Cooperative WMS Proxy Caching and Prefetching in an Educational Environment

  • Jeffrey A. Bergamini
  • Dr. Michael Haungs
Part of the Lecture Notes in Geoinformation and Cartography book series (LNGC)

Abstract

Given the great demand and promise for educational use of GIS, real time access to massive remote geospatial datasets for pedagogical purposes would be immensely useful to educators and students. However, such access has remained elusive. In other work, we have demonstrated that a P2P distributed system of client-side proxies can address the challenges posed by the interactive, multiplicative, and exploratory nature of classroom GIS, and we described this system at a high level. In this paper, we present the details of several novel techniques that enable P2P cooperative caching and prefetching of OGC WMS data in an educational lab environment, via an implicit and flexible pyramid tiling scheme, a query smoothing heuristic, and statistical prediction. The techniques are standards-compliant and client-transparent, and provide dramatic improvement in user response times while reducing impact on remote WMS servers.

Keywords

WMS P2P caching prefetching tiling education 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  • Jeffrey A. Bergamini
    • 1
  • Dr. Michael Haungs
    • 1
  1. 1.California Polytechnic State UniversityDepartment of Computer ScienceSan Luis ObispoUSA

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