GML空间数据传输与交换研究  

Research on GML Spatial Data Transport and Transformation

作　　者：陈建华[1] 苗放[1] 王华军[1] 王卫红[2] 

机构地区：[1]成都理工大学信息工程学院 [2]成都理工大学地球科学学院

出　　处：《微计算机信息》2009年第33期19-21,共3页Control & Automation

基　　金：项目名称:"基于数字地球平台的地球科学研究框架";基金颁发部门:四川省教育厅项目(2006A117)

摘　　要：基于XML的Internet环境下地理空间信息的国际编码标准GML,正得到广泛的关注和应用。GML空间数据作为文本格式的数据,其中包含了大量的结构描述信息,从而导致数据在网络上传输时占用带宽并耗时。论文分析了前人针对XML与GML数据的多种数据压缩方案,并基于简单高效实现GML数据传输的思路,提出采用单纯压缩、解压方式实现GML数据的传输,并通过实验对比分析得出Zip压缩算法在GML数据压缩传输中具有明显优势。另外,GML数据如欲通过KML、SVG等方式图形化表达,需进行数据交换。由于三者皆为XML格式数据,XSLT可有效而直接的实现它们之间的交换,论文并给出了GML与KML交换的示例。GML, based on XML and as an international encoding standard for geospatial information under Internet, is widely being concerned about and applied. As text format data, GML spatial data include a large number of structure information, which results in bandwith occupied and time consumed when transporting. This paper analysed several data compression schemes, and proposes simple GML data transport scheme based on pure compression and decompression. And experiment shows that Zip compression algorithm is much more superior than others on GML data compression transport. Furthermore, in order to graphiely express GML data with KML and SVG mode, it needs to be transformed. As all of the three are based on XML, the XSLT can make the transformations among them, this paper gives the example transformation between GML and KML as well.

关 键 词：GML空间数据 传输 压缩/解压 交换 XSLT 

分 类 号：P208[天文地球—地图制图学与地理信息工程]