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3 November 2008 Query evaluation on efficiently encoded GML streams
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Proceedings Volume 7143, Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Geo-Simulation and Virtual GIS Environments; 714308 (2008) https://doi.org/10.1117/12.812529
Event: Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Geo-Simulation and Virtual GIS Environments, 2008, Guangzhou, China
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.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jie Yan, Jinyun Fang, and Chengde Han "Query evaluation on efficiently encoded GML streams", Proc. SPIE 7143, Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Geo-Simulation and Virtual GIS Environments, 714308 (3 November 2008); https://doi.org/10.1117/12.812529
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