Vista en Perfil Transversal de Peraltes o Superelevation Autodesk Civil 3d

Export Google Earth to AutoCAD use Global Mapper

Step by step images ( Click to open image )

1.- Select the place and make a polygon of the area in study 

 

2.- Open the file "Kmz" of google earth and setting the proyection, zone, datum and planar units.

3.- Select online Data Source to download. The Data Aster GDEM 2 is free, but no is exact. You can use as reference