Returns the zone given a latitude and longitude, or the latitude and longitude ranges given a zone.
Examples:
utmzone (43, -79) => ans = 17T
Can also handle the special zones of Norway
utmzone (60, 5) => ans = 32V
For zones:
utmzone ("17T") => ans = 40 48 -84 -78
[lat, lon] = utmzone ("17T") => lat = 40 48 lon = -84 -78
Package: mapping