Rotating nps

[Eric DeWeaver]

Try

'set mproj nps'
'set lat 20 90'
'set lon -270 90'
'set mpvals -270 90  20 90'

If you're plotting a defined variable rather than a variable
in the .ctl file you also need to define the variable on the
longitudes you're going to use.   An easy thing to do is just
put 'set lon -400 400' before you define any variables.

Good luck,

Eric

On Tue, 9 Aug 2005, Danny Blair wrote:

> Help!  I'm making northern hemisphere maps of various things, but can't
> figure out how to rotate the nps projection so that North America is
> vertical, north up.  A previous post suggests that I simply have to use
> something like 'set lon -270 90', with the two numbers differing by no more
> than 360, but that doesn't work; this does put North America in the correct
> position, but the map is blank except for the wedge of longitudes between 0
> and 90E.
>
> Using GrADS 1.8SL11 on Linux.
>
> The .ctl for the dataset looks like this:
>
> dset          ^1000mb1950to2004.dat
> undef         -9.99e+33
> title         1950 to 2004 twice daily 1000mb hgt
> xdef          145 linear 0 2.5
> ydef          37 linear 0 2.5
> tdef          40178 linear 00z01jan1950 12hr
> zdef          1 levels 1000
> vars          1
> hgt           0 99 hgt mb height
> endvars
>
> This is merged reanalysis data (55 years, 00z and 12z), north hem only.
>
> Cheers!
>