I recently downloaded 5' contours from a county's GIS portal, but that's not quite precise enough... Did some searching and found where I could download some 2' contours for same, but in .GDB format which Civil 3D doesn't play nice with so far as I could find.
I downloaded a trial of ArcGIS Desktop 10.2, and have worked out how to load the .GDB, and export a .SHP, but it's not in the correct coordinate system (it doesn't line up with same county's aerials, nor the adjacent county's GIS line work).
I thought it was due to the source units being in Meters, and GCS_North_American_1983_HARN, so in ArcMap, Data Frame Properties, I've changed the General tab, Units to Feet, and Coordinate System tab, Transformations..., Converted from GCS_North_American_1983_HARN into GCS_NAD_1983_2011, using NAD_1983_HARN_To_NAD_1983_2011, and still no change in the location of the resultant .SHP file linework. Grrr.
Any guidance would be greatly appreciated.
Cheers