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I am not aware of any libraries that might do this, but using an Arc will not represent your elliptical curve properly. And seeing the two radii differ quite greatly (571 versus 250), if you simply convert this to an arc it will look like your original geometry. You can deal with this by converting it to stroked polygon, which will best match your elliptical arc. Googling should give you plenty of algorithms to use for the exact calculations.
Thanks Stefan. I got you on the concept. I need to store a polyline for the elliptical arc in Oracle. Any link to such an algorithm for the calculations.
Maybe you can find something [url http://mtshome.sw3solutions.com/cppComputerGraphics.html]here. I have never had the need to do something like this, so don't have anything for you. If this site doesn't help you, you can always try [url http://www.google.com]Google.
It is done finally. Thanks.