#138667 - 10/07/200314:19Re: How to get routes for GPSapp?
[Re: Daria]
Ezekiel
pooh-bah
Registered: 25/08/2000
Posts: 2413
Loc: NH USA
The formula is very simple, now that I've actually engaged my brain:
Distance (Naut. Mi.) per degree east/west = 60.1*cos(decimal latitude). At the equator, it's 60.1 NM per degree longitude (east/west). At the north & south pole it's zero.