Adaptive proxy map server for efficient vector spatial data rendering

Abstract. The rapid transmission of vector map data over the Internet is becoming a bottleneck
of spatial data delivery and visualization in web-based environment because of increasing data
amount and limited network bandwidth. In order to improve both the transmission and rendering
performances of vector spatial data over the Internet, we propose a proxy map server enabling
parallel vector data fetching as well as caching to improve the performance of web-based map
servers in a dynamic environment. Proxy map server is placed seamlessly anywhere between the
client and the final services, intercepting users’ requests. It employs an efficient parallelization
technique based on spatial proximity and data density in case distributed replica exists for the
same spatial data. The effectiveness of the proposed technique is proved at the end of the article
by the application of creating map images enriched with earthquake seismic data records.


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