I handle 2D surveyor DWGs all the time, and it may be that I will end up having the surveyor explode his Land Development objects into simple 2D info that AC can handle easier. But I am curious if there is a better way to handle his data.
He did tell me that the software actually references external databases that store the topo information. Maybe I just need the info from the database to build the site using ArchiTerra. From Cigraph's website:
...thanks to ArchiTerra features, read information directly from lists of points (TXT format) and DXF drawings.
Still curious if anybody is familiar with LDD.