Convert NURBS Curve to Ellipse

I have a series of tangent arcs that I want to project to a plane and convert to elliptical curves. Is there some simple way to do this?

Hello- if they approximate an ellipse, set a CPlane to the projection plane and oriented as best you can judge to the axes of the ellispe. Make a CPLane based BoundingBox and then use the resulting rectangle as a guide to make an Ellipse > Corner.