At present each Circle is drawn using 500 equally-spaced vertices. In the
plane, using only 500 vertices would introduce a maximum deviation of:
R * (1 - cos(2 * Math.PI / 1000))
= R * 0.00002
= 2 km
So Circle is not presently accurate enough for your purpose.
If you need to be accurate to meters it's probably not enough to consider
the Earth as an oblate spheroid - you will need a terrain model too.
On Mon, Oct 4, 2010 at 1:34 AM, VelkyKorys <[email protected]> wrote:
> Can anyone tell me, what is the accuracy of the Circle overlay. It
> does not seem to me good enough when I am trying to draw a hemisphere
> overlay (a circle of radius about 10000 km) - I would like to have it
> correct up to meters or at most tens of meters. I guess here
> oblateness on the poles gets involved. How is that managed? Is there a
> way how can I make it more accurate?
>
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