3〔4〕 Hu J.X,.Wu L.X.,Ying Z.R.et.al.,Study on Digital Mine And Related KeyTechnologies,Towards Digital Earth:Proc.of Int.Sym.on DE,Beijing,Science Press 1999:421—426
4〔5〕 Du P.J.,Sheng Y.H.,Guo D.Z.,Application of Digital Earth and SustainableDevelopment of Mining Area,Towards Digital Earth:Proc.of Int.Sym.on DE,Beijing,SciencePress 1999:112—115
7〔12〕 Wu Lixin et.al.,A ID-coding method containing quadrant label for non-boundary3DGIS,2ndIne.Workshop on Dynamic And Multi-Dimensional GIS,4-6Oct.,Beijing,1999:105—108
8〔15〕 Wu Lixin et.al.,The research and development of networked Mining Cord-GIS,2ndInt.Workshopon Dynamic And Multi-Dimensional GIS,Beijing,1999:359—364
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