dset ^topo25x25.grd                                
options template big_endian
undef -9999
title NCAR/NCEP topographic GRID data (no missed data) (2.5 degree latitude by 2.5 degree longitude)
xdef  144 linear   0.00   2.50
ydef  73 linear   -90.00   2.50
zdef   1 levels 1000
tdef 1 linear 00Z01Jan1997 1mo
vars   1
zs  1 99 var Topo
endvars