Haven't registered yet? The North American Association of Summer Sessions (NAASS) is an association of deans, directors and administrators of college and university summer programs located throughout the United States, Canada, and Mexico.
UTM zones are numbered 1 through 60, starting at the international date line, longitude 180Â°, and proceeding east. Zone 1 extends from 180Â° W to 174Â° W and is centered on 177Â° W. Each zone is divided into horizontal bands spanning 8 degrees of latitude.
The map above shows how the NATO UTM system divides the earth into 60 longitude zones, each six degrees wide. The numbering begins at Zone 1 at 180 degrees west and proceeds eastward. To find the grid zone for any longitude: 1  Treat west longitude as negative and east as positive. 2  Add 180 degrees; this converts the longitude to a number between zero and 360 degrees. 3  Divide by 6 and round up to the next higher number.