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Proceedings Paper

Query evaluation on efficiently encoded GML streams
Author(s): Jie Yan; Jinyun Fang; Chengde Han
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Paper Abstract

We consider the growing need for querying GML stream and the bulkiness of textual GML. To get things better, we firstly analyze the applicability of Efficient XML Interchange (EXI) encoding for GML and propose EXI encoded GML. Then we develop the SITPath query language supporting geospatial data types and some rich characteristics inherited from XPath within the constraints of streaming limitation. We subsequently present the streaming query evaluation algorithm and some main parts of EGQ engine that evaluates SITPath queries on EXI encoded GML without decoding in advance. Finally, the experimental results indicate the practical time and space performance advantages of EGQ brought about by the query evaluation algorithm and EXI encoding.

Paper Details

Date Published: 3 November 2008
PDF: 12 pages
Proc. SPIE 7143, Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Geo-Simulation and Virtual GIS Environments, 714308 (3 November 2008); doi: 10.1117/12.812529
Show Author Affiliations
Jie Yan, Institute of Computing Technology (China)
Graduate Univ. of Chinese Academy of Sciences (China)
Jinyun Fang, Institute of Computing Technology (China)
Chengde Han, Institute of Computing Technology (China)


Published in SPIE Proceedings Vol. 7143:
Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Geo-Simulation and Virtual GIS Environments
Lin Liu; Xia Li; Kai Liu; Xinchang Zhang; Aijun Chen, Editor(s)

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