Re: [OpenMap Users] OMEllipse question

From: Davidian <kroberts_at_syrres.com>
Date: Wed, 28 May 2008 11:13:55 -0700 (PDT)

> If your major axis had the larger value, it looks right to me.

The major axis will always be the larger value as per the definition of
major axis.

> The rotation is performed around the center point.

Yes, I understand that.

>> It looks like OpenMap's default way of drawing an OMEllipse (i.e., with a
>> rotation angle of 0.0) is to place the major axis (longer) along the
>> east/west plane, and the minor axis along the north/south plane.

>Yes.

This is the part that gets me. I'm not sure why, but I thought the
convention was that the major axis would run north/south by default (i.e.,
if no rotation angle was applied). Now it seems as if there is no
convention, which doesn't seem possible.

>What happens if you swap your axis values when you create the OMEllipse?

I'm sure the ellipse would appear correct, visually anyway. My problem is,
everything is off by 90 degrees when I use the OMEllipse class. I was just
wondering if anyone has ever brought this up before.

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Received on Wed May 28 2008 - 14:14:17 EDT

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