I am a designer at an architectural firm and have been using Sketchup for about 5 years now. I usually design in Sketchup and periodically export to AutoCAD for submittals, but sometimes I need to import ALTA surveys from AutoCAD into Sketchup and have trouble accurately transferring curves because Sketchup simplifies them into segments.

I know how to increase the segments of a curve in Sketchup; problem is that Sketchup does not recognize AutoCAD curves so there is not even a curve to modify.

I know that if I change all of the curves on the ALTA survey in AutoCAD to splines Sketchup will much more closely trace them as much smaller segments; problem is that AutoCAD does not join splines to plines which is usually necessary and splines are quasi-parabolic so they do not accurately trace arcs.

I would like to find a way to get my AutoCAD curves into Sketchup so that no accuracy is lost; or I would like to find a way to automatically up the level of segmentation to say at least 50 segments per curve.

I typically use multiple programs for my work so if someone has a solution that requires going from AutoCAD to another third party software and then into Sketchup that is fine with me. I use this method for a lot of little tricks that help compensate a programs weakness. -Nate