'Return a list of coordinates for a complete metatile.
Results are guaranteed to be ordered left-to-right, top-to-bottom.'

def allCoords(self, coord):

    (rows, columns) = (int(self.rows), int(self.columns))
    row = (rows * (int(coord.row) / rows))
    column = (columns * (int(coord.column) / columns))
    coords = []
    for r in range(rows):
        for c in range(columns):
            coords.append(Coordinate((row + r), (column + c), coord.zoom))
    return coords
