3Huang H,Li Y,Georg C.SVG-based spatial information representation and analysis[J].Web and Wireless Geographical Information Systems,2008,5373:17.
4Dong X,Li Y.Standardization of SVG in implementing WebGIS[C]//International Conference on Environmental Science and Information Application Technology.Wuhan:Intelligent Information Technology Application Research Association,2009:534-537.
5Ota M,Jelinek I.Differential conversion:DWG-SVG case study[J].Cooperative Design,Visualization,and Engineering,2007,4674:132.
6Brandon Plewe.The Nature of Uncertainty in Historical Geographic Information[].Transaction in GIS.2002