(This equation describes a circle in terms of three
of its points)
The coordinates given on this page are not real! The three
caches are:
This is a more advanced version of the
Circumcentre 2 cache. See those cache details as it's a
very good idea to do that one first. Maps aren't likely to be
of use (unless you have enough of them to spread all over the
living room floor) and your GPS may not have the precision required
- chances are you'll just have to do the maths this time.
The errors in the grid projections begin to show over these
large distances when used in Euclidean calculations, but the're
still pretty good for this purpose. Use Map Grid
coordinates in the calculations.
The cache is a 250ml plastic clear plastic jar, about 12m away from the calculated circumcentre. In the fork of a tree, 1.5m off the ground.
You can check your answers for this puzzle on
Geochecker.com.