I'm new to the forum and new to Revit. I've been lurking here for about a week and like what I see. I like Revit too, so far, and have a set of drawings well underway already. To start my project I imported a Google Maps Terrain (Import Symbol) and started laying out a house on a rather steep site. Basically, the lowest level has a full height wall above grade on the downhill side and a full-height retaining wall on the uphill side. I wasn't able to figure out an easy way to convert the Google Terrain triangular grid to a Revit toposurface. I searched the forum but if there is an answer here already I couldn't find it. I want to end up with contour lines at 2' intervals. What's the easiest way to do this?