This cache is designed to add elements to our hobby and deepen the insight. Being open to new perspective makes the puzzle easier and enjoyable.
The mystery itself couldn't be much simpler. Real coordinates in decimal degrees that take you directly to the cache are:
Clues for the variables are given as
UPDATE MAY 2015:
I didn't expect the cache surviving this long. The hollow trunk that once provided nice hidey hole is now mostly rotten. ½ litre Tupperware is hidden under its remains. Please cover the box well.
New measurement indicated that following correction might help to spot the cache. N: +0,00007° E: -0,00003°. Use your own best judgement to determine if such fine tuning has any meaning