code: def from_xyz(cls, x, y, z):
          
          bb = xy_bounds(x, y, z)
          return cls.from_bounds(xmin=bb.left, ymin=bb.bottom,
                                 xmax=bb.right, ymax=bb.top,
                                 crs=WEB_MERCATOR_CRS)
docs: Creates GeoVector from Mercator slippy map values.