My name's Ryan, I've been using Revit Arch and Struc for about 2 years. Recently we took a job where the surveyors gave us a CAD file designed with AutoCAD Map 3d 2010. The CAD file seem's to be fine in everyway from what i can tell, however when we bring it into Revit as an underlay its scaled approximately 110 [and change] times down from what's needed. After scaling up the file so much it becomes virtually unusable. I've been in contact with the company that provided the file and have been told they model everything at a 1:1 scale and they do everything 'unitless'. I'm trying to bridge the gap between CAD and Revit with little luck. Any suggestions as to how the surveying company can modify their file to be bigger as an exported CAD file, reducing the amount of scaling we need in Revit?
Addendum: If i take the CAD file and scale their drawing up (changing dimensions etc from their actual value) the file stabalizes in Revit.