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H. Huang, Y. Li, G. Gartner:
"A load balancing method to support spatial analysis in XML/GML/SVG-based WebGIS";
in: "Advances in Web-based GIS, Mapping Services and Applications", issued by: Songnian LI, Suzana Dragicevic, and Bert Veenendaal; ISPRS Buchreihe, Leiden, 2011, ISBN: 978-0-415-80483-7, 153 - 168.

This chapter aims at introducing methods for load balancing spatial analysis into XML/GML/SVG-based WebGIS. We propose that the decision on where to execute spatial query operations (server side or browser side) should be based on the network communication cost versus the computational cost. This chapter mainly focuses on the network communication cost. After analyzing the workflow of spatial analysis, we address the following issues: GML (server side)/SVG (browser side) -based spatial information representation, spatial query language, and load balancing middlewares for dispensing spatial queries to either server side or browser side. Finally, we design some case studies to evaluate the proposed method. The results prove that our methods are feasible and operable to support spatial analysis in the Web environment, and have a good performance compared to the server side solution and the browser side solution. The methods enable users to access spatial analysis functions simply with a web browser with SVG support.

XML/GML/SVG, WebGIS, spatial analysis, load balancing, network communication cost, spatial data modeling, SVG-based Spatial Extended SQL