Here is a demo page:
http://ben.appleton.googlepages.com/brainbackup-example.html

You'll be interested particularly in

function offset(source, target, distance)

source - The starting LatLng
target - The destination LatLng
distance - How far to walk from the source toward the destination
return value - A new LatLng, as though you had started at the source and
walked toward the destination by the given distance (in meters).

In your page, you'll want to set
source = center of circle
target = user
distance = circle radius (meters)

On Mon, Nov 16, 2009 at 11:53 AM, GG <[email protected]> wrote:

> Yup, no need to adjust for projection.  The two points will usually be
> a few miles from one another.
> Any chance you can help convert what you said in english into
> javascript? =)
> Makes perfect sense, but I could never do that.
>
> function edgeOfCircle(userLatLng, fauxLatLng, radius){
>
> }
>
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