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-33.0/-23.0/35.5/43.0 -I1m -Glixo_geo.grd"
	attribute history = "grdreformat test/potential/geoid_1m.nc geoid_1m.nc"
	attribute title = "Produced by grdreformat"
dataset /x: float64, shape (601)
	attribute actual_range = -33.0, -23.0
	attribute long_name = "x"
// x: first -33.0, last -23.0, count 601
dataset /y: float64, shape (451)
	attribute actual_range = 35.5, 43.0
	attribute long_name = "y"
// y: first 35.5, last 43.0, count 451
dataset /z: float32, shape (451, 601)
	attribute _FillValue = nan
	attribute actual_range = -1.342563509941101, 5.712365627288818
	attribute long_name = "z"