Terramodel Software for civil design and survey. Notable strengths of Terramodel 10.61 include Point-based 3D CAD Fast and accurate terrain modelling and volumes Powerful road design Data transfer to and from a wide range of survey and civil engineering systems A huge range of extra commands by Geocomp Systems Available modules include CAD, Cogo, Contour, Site Design, Roadway, ASAP, Image manager, Hydrology and Sewer. By Trimble.