The Gmap Pedometer is also a little off on road locations on the map...lacks some fidelity to the satellite imagery.
Google Earth is good, but a skosh slow.
However, I think you are correct that the RD is responsible for getting the course information out (certification number, map, etc.) to the individual participant.
I've had an interesting time trying to get RDs to provide the cert. number for the general population...as well as confronting RDs who say incorrectly (whether by stupidity or ignorance, I am not certain) their course is certified...don't have the number, don't have the cert...don't have the map...and so on.