query.py 文件源码

def BottomNeighbor(self, tileid):
    return tileid if (tileid < self.ncolumns) else (tileid - self.ncolumns)

  # Get the list of tiles that lie within the specified bounding box.
  # The method finds the center tile and spirals out by finding neighbors
  # and recursively checking if tile is inside and checking/adding
  # neighboring tiles