code: def inverse_mercator(xy):
      
      lon = (xy[0] / 20037508.34) * 180
      lat = (xy[1] / 20037508.34) * 180
      lat = 180 / math.pi * \
          (2 * math.atan(math.exp(lat * math.pi / 180)) - math.pi / 2)
      return (lon, lat)
docs: Given coordinates in spherical mercator, return a lon,lat tuple.