Is there a standard setup all Geocachers use? Are we all using the same datum (WGS-84)? Nautical or Statute miles? I ask because I was loking for maps inmy area on the internet and used my home's coordinates and I didn't get any map. Im setup for wgs-84 datum, nautical miles, and I have plotted my location on an aeronautical sectional. Am I doing something wrong ?