Help with dimensioning an ellipse

[David Munoz]

Can anyone tell me how to get the angles necessary to create an ellipse. I have drawn an ellipse but AutoCAD cannot dimension this object. Is there any way to figure this out if I have already created the ellipse in my drawing and I just want to dimension it? Any information would be greatly appreciated.

Thanks,
David Munoz

 

[Paul Turvill]

What does the ellipse represent? If it's a circle viewed from an angle, then just the major axis (and possibly the viewing angle) will do. If it's an architectural feature, then you'll need to show enough to construct it from arcs or some such.

Dimensioning a true ellipse is tricky, because its radius is constantly changing as you traverse the perimeter.

You might consider setting PELLIPSE=1, so that AutoCAD will approximate the ellipse with a multiple-arc polyline; then you can EXPLODE the polyline and work with the individual ARC objects.
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