radsel

Thank You, I just found this on the site : "Currently, Geocaching uses the WGS84 datum for all caches. Many maps still use NAD27, which can cause confusion if your GPS unit is set to NAD27. Always check your GPS to ensure that WGS84 is the datum before entering a cache coordinate into your unit."

Ok, Major Newbee here,but what is the DATUM I should be using for my Area? 44.39.48n 123.07.64w(Albany Oregon,nearSalem).I know what they are for,but don't know which one to use. I have tried to research this,and have found three possible answers: WGS84,NAD27,orNAD83(which may all be wrong).As I change them,I get slightly differnt readings,by a few hundred meters.If any one has a link to a page that explains these,that would be great.Thanks in Advance.