original_docstring:  Return the northwest corner point from a Tile.
  
          Returns
          -------
          Point
          
docstring: Return the northwest corner point from a Tile.
  Returns
  
  Point
docstring_tokens: Return the northwest corner point from a Tile . Returns Point
code: def nw_corner(self):
          """ Return the northwest corner point from a Tile.
  
          Returns
          -------
          Point
          """
          z = self.z
          x = self.x
          y = self.y
          n = 2**z
          lon = float(x)/n * 360.0 - 180.0
          lat = math.atan(math.sinh(math.pi * (1-2*y/n))) * 180.0 / math.pi
          return Point((lon, lat), crs=LonLatWGS84)
code_tokens: def nw_corner ( self ) : z = self . z x = self . x y = self . y n = 2 ** z lon = float ( x ) / n * 360.0 - 180.0 lat = math . atan ( math . sinh ( math . pi * ( 1 - 2 * y / n ) ) ) * 180.0 / math . pi return Point ( ( lon , lat ) , crs = LonLatWGS84 )
short_docstring: Return the northwest corner point from a Tile.
short_docstring_tokens: Return the northwest corner point from a Tile .
comment: """ Return the northwest corner point from a Tile.
  
          Returns
          -------
          Point
          """