GRID
  TYPE structured
  NXYZ 2 2 2
  ORIGIN 0.d0 0.d0 0.d0
  DXYZ
    0.9d0 1.1d0
    0.99d0 1.01d0
    0.999d0 1.001d0
  /
END

REGION bc
  FACE EAST
  COORDINATES
    2.d0 0.99d0 0.999d0
    2.d0 2.d0 2.d0
  /
END

REGION obs_pt
  COORDINATE 1.45d0 1.495d0 1.4995d0
END
