import math


def get_zone(coord):
    """ Finds the UTM zone of a WGS84 coordinate """
    # There are 60 longitudinal projection zones numbered 1 to 60 starting at 180W
    # So that's -180 = 1, -174 = 2, -168 = 3
    zone = ((coord - -180) / 6.0)
    return int(math.ceil(zone))