Research on Compression Technology of GML-based Spatial Data
Yan Li · Jisuanji gongcheng · 2010
Aiming at the high cost of transmitting and preserving for redundancy GML-based spatial data,a compression method is presented.It uses VTD-XML to parse GML document and designs GBW transform which transforms tree structure of GML-based spatial data to two linear structure data.It uses GZip to compress the data and output it.Experimental result indicates it defeats common methods and can improve compression rate of GML-based spatial data efficiency while not needing more compression and de-compression time.