And how would you think the waypoints are defined in the database? Lat/long numbers, any chance? Or do you imply a database one paid for is more reliable because of the amount one paid for it? I'am afraid I am missing something somewhere.
Entering waypoints
on a moving map GPS is a simple matter of clicking the mouse or pressing the screen at the appropriate point. The way point must then be in the correct place on the route and map. If in doubt do a "simulated" flight of the route. Entering multiple digits and setting off blind and hoping for the best is simply asking for trouble. Reminds me of one time I entered "Bangor" into a route simply using a stored database of towns in the GPS. This was on a flight to Caernarfon in North Wales. I spotted that something might be wrong when it tried sending me off across the Irish Sea to Bangor in Northern Ireland. Someone later remarked that I was lucky not to have ended up in Bangor Maine in Canada (or wherever it is.)
If you can see the route on a map before you set off you can't
really go wrong.