A new vector data compression approach for WebGIS |
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| Authors: | Yunjin Li Ershun Zhong |
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| Institution: | LI Yunjin,ZHONG Ershun Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,11A Datun Road,Chaoyang District,Beijing 100101,China |
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| Abstract: | High compression ratio,high decoding performance,and progressive data transmission are the most important require-ments of vector data compression algorithms for WebGIS.To meet these requirements,we present a new compression approach.This paper begins with the generation of multiscale data by converting float coordinates to integer coordinates.It is proved that the distance between the converted point and the original point on screen is within 2 pixels,and therefore,our approach is suitable for the visualiz... |
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| Keywords: | vector data compression WebGIS progressive data transmission |
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