Hello again!
I assume the USGS 3D imagery is lidar. But in any case, I wanted to warn you about something. My property, like many others in Santa Cruz has old roads that were never paved and are not maintained. These could be as basic as a skid trail for pulling logs out of the woods, or an easement that's more developed. My property has an easement that, at one time, provided access to other houses. BUT that "road" is overgrown with trees and has vanished completely in places. Lidar would certainly show it as an apparent road and I'm pretty sure that's what happened with Google maps. They are not letting me edit out the faux road. My problems are for the moment solved, but I wanted to let you know that just because something looks like a road with lidar doesn't mean it is. Santa Cruz County is rife with skid trails and other old unused roads. 