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koorukuroo/epsg_4326_900913

Forked from sepulchered/epsg_4326_900913
Last active August 29, 2015 14:17
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epsg_4326_900913
def epsg_4326_to_900913(lon, lat):
x = lon * 20037508.34 / 180
y = (math.log(math.tan((90 + lat) * math.pi / 360)) / (math.pi / 180)) * (20037508.34 / 180)
return x, y
def epsg_900913_to_4326(x, y):
lon = x * 180 / 20037508.34
lat = (360 / math.pi) * math.atan(math.exp(y * math.pi / 20037508.34)) - 90
return lon, lat
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