Volume 32 Issue 12
Dec.  2007
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ZHU Haijun, WU Huayi, LI Deren. DCT-Based GIS Vector Data Compression[J]. Geomatics and Information Science of Wuhan University, 2007, 32(12): 1123-1126.
Citation: ZHU Haijun, WU Huayi, LI Deren. DCT-Based GIS Vector Data Compression[J]. Geomatics and Information Science of Wuhan University, 2007, 32(12): 1123-1126.
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DCT-Based GIS Vector Data Compression

  • 1 State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,129 Luoyu Road,Wuhan 430079,China

Funds: 国家973计划资助(2006CB701304);国家教育部长江学者和创新团队发展计划资助项目(IRT0438);国家教育部新世纪优秀人才支持计划资助项目(NCET-06-0619)
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  • Received Date: October 14, 2007
  • Revised Date: October 14, 2007
  • Published Date: December 04, 2007
    Graphical Abstract
    • Abstract
  • A technical framework of DCT-based GIS vector data compression is proposed.DCT is applied to transform vector data into combination of cosine curves,while in this combination coefficients are quantified to integers before lossless coding to compressed bit-stream.Experimental results show that this compression framework works well for naturally formed linear vector data with very high compression ratio while its distortion is well controlled by predefined thresholds.
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