In this paper, the concept of SDTM(Synthetic Digital Terrain Model) as a general condition model of civil engineering design is suggested and the original concept of DTM and DEM (Digital Elevation Model) enlarged.是什么意思_In this paper, the concept of SDTM(Synthetic Digital Terrain Model) as a general condition model of civil engineering design is suggested and the original concept of DTM and DEM (Digital Elevation Model) enlarged.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句