[gradsusr] convertion of netCDF file into binary
Jayakrishnan P.R
prjayakrishnan at gmail.com
Wed May 18 04:50:09 EDT 2016
Pls do the following. Just send one days output as grd file and
corresponding ctl file.
There is a big chance for wrong contouring due to the endian difference in
machines. So you may have to give options little_endian or big endian
whatever may be the case.
On Wed, May 18, 2016 at 4:43 PM, Lekshmi Mudra <lekshmimdr at gmail.com> wrote:
> I tried the same and got the binary data. The .ctl file prepared for
> the same is opening in grads, but the plott displaying is wrong. There
> is some problem in contouring, but how it is occuring that i'm not
> understanding.
>
> Thank you.
>
> On 5/18/16, Jayakrishnan P.R <prjayakrishnan at gmail.com> wrote:
> > Try this one. Why 'define january=rainfall' and 'd rainfall'
> ??.....instead
> > of d january ?.. Also the set time 'set time Jan1950 Dec2015'
> > statement is inactive inside he loop. I removed that also. If still
> error,
> > then try with set x and set y.
> >
> > 'reinit'
> > 'c'
> > 'sdfopen IMD_Precip_1948-2015.nc'
> > 'set lat 6.5 38.5'
> > 'set lon 66.5 100'
> > 'set fwrite jan.bin'
> > tt=25
> > while(tt<=816)
> > 'set t 'tt
> > 'set gxout fwrite'
> > 'd rainfall'
> > tt=tt+12
> > endwhile
> > 'disable fwrite'
> >
> >
> > On Wed, May 18, 2016 at 2:03 PM, Lekshmi Mudra <lekshmimdr at gmail.com>
> > wrote:
> >
> >> Before using sdfwrite, i tried 'fwrite'. The resultant binary file is
> >> not working. Here i'm attaching gs file for extracting monthly data
> >> from nc file and respective .ctl file for the monthly data.
> >>
> >> Below given are the details of .nc file for IMD rainfall from 1948-2015
> >> Grid coordinates :
> >> 1 : lonlat > size : dim = 17415 nx = 135 ny = 129
> >> lon : first = 66.5 last = 100 inc =
> >> 0.25 degrees_east
> >> lat : first = 6.5 last = 38.5 inc =
> >> 0.25 degrees_north
> >> Vertical coordinates :
> >> 1 : surface : 0
> >> Time coordinate : 816 steps
> >> >
> >> ga-> q file
> >> File 1 : Monthly cumulative rainfall
> >> Descriptor: IMD_Precip_1948-2015.nc
> >> Binary: IMD_Precip_1948-2015.nc
> >> Type = Gridded
> >> Xsize = 135 Ysize = 129 Zsize = 1 Tsize = 816 Esize = 1
> >> Number of Variables = 1
> >> rainfall 0 t,y,x Rainfall
> >>
> >>
> >> Thank you all for the suggestions.
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> On 5/18/16, Jayakrishnan P.R <prjayakrishnan at gmail.com> wrote:
> >> > Share your gs file along with the ctl file which you used for opening
> >> > the
> >> > converted binary file so that someone can have a look into it for
> >> > error.
> >> As
> >> > already pointed out by users, sdfwrite is for writing a file into
> >> > netcdf
> >> > format. Here is a sample gs file which can be used for converting OLR
> >> into
> >> > .bin file. Have a look and modify it for your purpose. Best of Luck.
> >> >
> >> > 'reinit'
> >> > 'sdfopen D:/computation2008/IITM_OLR_2008.nc'
> >> > 'set lon 62 72'
> >> > 'set lat 5 15'
> >> > prompt 'key-in file name for olr : '
> >> > pull fname
> >> > 'set fwrite 'fname
> >> > tt=153
> >> > 'set t 'tt
> >> > 'set gxout fwrite'
> >> > 'd olr'
> >> > 'disable fwrite'
> >> >
> >> >
> >> >
> >> > On Tue, May 17, 2016 at 8:59 PM, Mikovitz, Colleen (LARC-E302)[SCIENCE
> >> > SYSTEMS AND APPLICATIONS, INC] <j.c.mikovitz at nasa.gov> wrote:
> >> >
> >> >> The sdfwrite is for writing into another .nc file
> (sdf=self-describing
> >> >> format).
> >> >>
> >> >> Use ‘set gxout fwrite’ along with ‘set fwrite’ Check out the
> >> >> documentation on http://cola.gmu.edu/grads/gadoc/gadocindex.html for
> >> each
> >> >> of those.
> >> >>
> >> >> As a tip, make sure your x and y are set exactly to what you want
> >> output.
> >> >> For example, ‘set x 1 360’ for a one-degree grid.
> >> >>
> >> >> Colleen
> >> >>
> >> >> On May 17, 2016, at 6:18 AM, Lekshmi Mudra <lekshmimdr at gmail.com>
> >> wrote:
> >> >>
> >> >> > Dear All,
> >> >> >
> >> >> > I have all India gridded (0.25 x 0.25) imd rainfall data
> >> >> > from
> >> >> > 1948 to 2015, which is in .nc format. I wanted to convert the same
> >> >> > into .bin format. I have tried using sdfwrite command. The resulted
> >> >> > binary file is not working properly.
> >> >> > Is there any solution?
> >> >> >
> >> >> >
> >> >> >
> >> >> > Lekshmi Mudra
> >> >> > _______________________________________________
> >> >> > gradsusr mailing list
> >> >> > gradsusr at gradsusr.org
> >> >> > http://gradsusr.org/mailman/listinfo/gradsusr
> >> >>
> >> >>
> >> >> _______________________________________________
> >> >> gradsusr mailing list
> >> >> gradsusr at gradsusr.org
> >> >> http://gradsusr.org/mailman/listinfo/gradsusr
> >> >>
> >> >
> >> >
> >> >
> >> > --
> >> > Sincerely
> >> >
> >> > **************************************************
> >> > Dr. Jayakrishnan P.R
> >> > Post Doctoral Research Fellow
> >> > C308, Institute of Ocean and Earth Sciences (IOES)
> >> > University of Malaya
> >> > 50603, Kuala Lumpur
> >> > Tel: (+603) 7967 4640 / 6995
> >> > Mobile: 012-3526094
> >> >
> >> > ****************************************************
> >> >
> >>
> >> _______________________________________________
> >> gradsusr mailing list
> >> gradsusr at gradsusr.org
> >> http://gradsusr.org/mailman/listinfo/gradsusr
> >>
> >>
> >
> >
> > --
> > Sincerely
> >
> > **************************************************
> > Dr. Jayakrishnan P.R
> > Post Doctoral Research Fellow
> > C308, Institute of Ocean and Earth Sciences (IOES)
> > University of Malaya
> > 50603, Kuala Lumpur
> > Tel: (+603) 7967 4640 / 6995
> > Mobile: 012-3526094
> >
> > ****************************************************
> >
>
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr
>
--
Sincerely
**************************************************
Dr. Jayakrishnan P.R
Post Doctoral Research Fellow
C308, Institute of Ocean and Earth Sciences (IOES)
University of Malaya
50603, Kuala Lumpur
Tel: (+603) 7967 4640 / 6995
Mobile: 012-3526094
****************************************************
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20160518/a10ba322/attachment-0001.html
More information about the gradsusr
mailing list