Fwd: correctionnnn ;-)

[ebrahim mirzaei]

---------- Forwarded message ----------
From: ebrahim mirzaei <emirzaei at gmail.com>
Date: Tue, Sep 29, 2009 at 8:10 AM
Subject: Re: display hgt.200812.nc
To: GRADSUSR at list.cineca.it


Hi Emily,If your data is netCDF, why don't you use sdfopen without .ddf or
.ctl file:

'reinit'
'sdfopen d:\gradsfile\ncdata\hgt.200812.nc'
 'set grads off'
'set grid off'
'set lon 220 310'
'set lat 20 60'
'set lev 500'
'set time 09z28dec2008'
'd hgt'



On Mon, Sep 28, 2009 at 9:17 PM, Emily <yi_zhou01 at yahoo.ca> wrote:

> Hi group members,
>
> I face a problem when I display 500 hpa geopotential height chart, it shows
> wrong data.
>
> My gs file is:
> 'reinit'
> 'open d:\gradsfile\ncdata\hgt200812.ddf'
> 'set grads off'
> 'set grid off'
> 'set lon 220 310'
> 'set lat 20 60'
> 'set lev 500'
> 'set time 09z28dec2008'
> 'd hgt'
> ====================
> My ddf is as below:
> DSET d:\gradsfile\ncdata\hgt.200812.nc
> DTYPE netcdf
> TITLE NARR 4D field Lambert Conformal Conic projection
> UNDEF 32766 missing_value
> UNPACK scale_factor add_offset
> PDEF 349 277 lcc 1 -145.5 1 1 50 50 -107 32463.41 32463.41
> XDEF 615 linear 150 0.3333
> YDEF 255 linear 2 0.3333
> ZDEF 29 levels 1000, 975, 950, 925, 900, 875, 850, 825, 800, 775, 750, 725,
> 700,
>  650, 600, 550, 500, 450, 400, 350, 300, 275, 250, 225, 200, 175, 150, 125,
> 100
> tdef 248 linear 00:00z01dec2008 3hr
> vars 3
> hgt 29 t,z,y,x  geopotential_height
> lat=>glat 0 y,x Latitude
> lon=>glon 0 y,x Longitude
> endvars
> =============
> My grads version: Grads 2.0 a3,
> window xp
>
> I notice that the contours laber values are like -25900, -25800..... I
> think the value is wrong. Then I check ncdump information, the hgt value
> from ncdump also shows like -25900,.....
>
> Is there some one knowing what wrong with this?Thanks very much.
>
> Regards,
>
> Emily
> York University, Toronto, Canada.
>
>
>
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