APPLICATION OF DIGITAL TERRAIN MODEL TO ROAD DESIGN
Nobuhiro ARAI	Nippon Engineering Consultants co.,ltd	5-1,Shichiza-cho,Kosigaya,Saitam 343,JAPAN
Kouji SAIKA	Nippon Engineering Consultants co.,ltd	5-1,Shichiza-cho,Kosigaya,Saitam 343,JAPAN
Takatoshi OKABAYASHI	Department of Civil Engineering,Nagasaki University	Nagasaki 852,JAPAN
<Abstract> Digitalization and sharing among engineers of topographical information is very important in the process from planning to execution of certain construction work. This paper presents an effective way of achieving cross-sectional and vertical topography with high-level 3-dimensional numerical topographical data,in order to construct topographical information to be used in basic and detailed road design.As well as showing topography by contour lines,actual field surveying data are supplemented by numerical topographical data,thus forming a digital terrain model for application to road design.
<Keywords> CAD, DTM, Information Sharing