Hi, Laurie Comerford
In AutoCAD the best you can do is to us the curve fit command to force the line thru them. If you use AutoCAD spline command then the line it draws does not go thru the points and in both cases it is a 2D line. I have found that concrete or edge of pavement on a curve is a theoretical curve at best. When the concrete crews bends the bender board it will more likely follow a spline. So if the surveyor would like to draw what is on the ground and contour it correctly then he needs to use a 3d spline. I just use curve fit command and gave up. Maybe one day we will get the surveying part to really work, like line work, contours, etc.. You need to look in advance numerical analyses books and think outside the box when look at them. Example: then TIN we use in AutoCAD can be traced to designing electrical circuits or least squares are like solving for moments on a structural truss.
