HDF5 file, superblock version 2
group /
	attribute Conventions = "COARDS, CF-1.5"
	attribute GMT_version = "5.0.1b_r12392 [64-bit]"
	attribute description = "surface -R-84000/75000/-78000/81000 -I1000 -T0.25 -Ggrav.par.surf.1km.sq_grd"
	attribute history = "grdreformat doc/examples/ex37/grav.V18.par.surf.1km.sq.nc grav.V18.par.surf.1km.sq.nc"
	attribute title = "Produced by grdreformat"
dataset /x: float64, shape (160)
	attribute actual_range = -84000.0, 75000.0
	attribute long_name = "x"
// x: first -84000.0, last 75000.0, count 160
dataset /y: float64, shape (160)
	attribute actual_range = -78000.0, 81000.0
	attribute long_name = "y"
// y: first -78000.0, last 81000.0, count 160
dataset /z: float32, shape (160, 160)
	attribute _FillValue = nan
	attribute actual_range = -60.0231819152832, 33.826725006103516
	attribute long_name = "z"