Catanserg

Hello, just a question:Iis waypoint projection down to cm possible? I know the common apps round it up to meters and it is not really necessary for everyday geocaching. It is just a general question. For example I have the coordinate N 45° 28.888 W 100° 01.111 and walk 17.35 meters north, that is 1735 cm.

I want to place a mystery, where you have to virtually go to the side of a Travel bug for the final coordinates. Is that allowed? Any good example with an existing mystery? Maybe I want to hide it in the website of the TB or the map, how the TB travels or something, not sure