No one told you why the field exists. Years ago, there were these abominations called "Locationless Caches", sometimes called Reverse Caches. Instead of giving coordinates to find an object, you described an object, and people went out and found one, and usually took a picture of the object, with the GPS in the picture (supposedly clear enough to see the coordinates). The coordinate field was added for these locationless caches, because usually the coordinates couldn't be read in the pictures (not that anyone ever checked them). What was the point of showing your GPS in the picture, or even of recording the coordinates? Beats me. I think it was a way to try and justify shoehorning in a obviously non-GPS game into a GPS game site. Anyway, like virtuals, the subjects got progressively more lame, and they didn't really fit the site, so they were eventually done away with. But the coordinate field was found to be useful for other things, such a reporting alternate coordinates, and later for documenting when an owner moves their cache.
