def edges(self):
return [self.delta[d,d] * numpy.arange(self.shape[d]+<NUM_LIT:1>) + self.origin[d]- <NUM_LIT:0.5>*self.delta[d,d]     for d in range(self.rank)]<EOL>
Edges of the grid cells, origin at centre of 0,0,..,0 grid cell.

        Only works for regular, orthonormal grids.