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Proceedings Paper

A cooperated P2P GIS for loose coupled governmental application
Author(s): Chenyu Li; Kunqing Xie; Xiujun Ma; Cuo Cai; Yanfeng Sun
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Paper Abstract

Current governmental applications are of large scale and always compute-intensive and data-intensive, and we focus on introducing P2P computing to facilitate loose coupled governmental applications in this paper. As GIS data is always deposited in locationally distributed nodes, which are probably administrated under spatial databases, the global range is divided into regions to eliminate complicated consistency maintenance and unnecessary message exchanging, and hierarchical spatial indexes are designed for efficient locating spatial resources and low control cost. When executing, a user submitted global spatial query are firstly parsed to sequential subtasks refer to distributed spatial index, and then dynamically passed to appropriate nodes and cooperatively accomplished. Nodes intercommunicate by cooperating messages, which are sent directly to the destination. Besides collaboration process of sequential execution, a dynamic alternative participant approach for failure handling of the sequential execution is provided, which saves the expensive rollback or abort. And this paper also designed and implemented a p2p based loose governmental application prototype, in which nodes intercommunicate via p2p network sub layer, also a user interface is implemented to manage the request from user and eventually reply a result.

Paper Details

Date Published: 6 August 2007
PDF: 9 pages
Proc. SPIE 6754, Geoinformatics 2007: Geospatial Information Technology and Applications, 67542Y (6 August 2007); doi: 10.1117/12.765232
Show Author Affiliations
Chenyu Li, Peking Univ. (China)
Kunqing Xie, Peking Univ. (China)
Xiujun Ma, Peking Univ. (China)
Cuo Cai, Peking Univ. (China)
Yanfeng Sun, Peking Univ. (China)

Published in SPIE Proceedings Vol. 6754:
Geoinformatics 2007: Geospatial Information Technology and Applications

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