Function lat2y

PythonAPI/examples/spawn_imagery.py:49–50

(a)

EARTH_RADIUS = 6378137.0 # in meters on the equator

def lat2y(a):
    return math.log(math.tan(math.pi / 4 + math.radians(a) / 2)) * EARTH_RADIUS

def lon2x(a):
    return math.radians(a) * EARTH_RADIUS