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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
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Seth, Once you have a GEMPAK grid file, you can plot the data using any of the "GD" programs in GEMPAK (see Chapter 4 of the user guide: http://my.unidata.ucar.edu/content/software/gempak/help_and_documentation/manual/chap4/index.php or the tutorial: http://my.unidata.ucar.edu/content/software/gempak/tutorial/gridprogs.html Use the NC decice driver for producing meta files for ntrans: http://my.unidata.ucar.edu/content/software/gempak/tutorial/ntrans.html For NMAP2 the file would typically be placed in the $MODEL data directory, and referenced using a file template defined in $GEMTBL/config/datatype.tbl. You can redefine $MODEL to point to a specif area for your project instead of real-time data. Functions for the specific gridded data sets defined in datatype.tbl are provided in $GEMTBL/nmap/mod_res.tbl. For data files that are not the current data/tim, you would set the appropriate time using the data selection pullup. A sample case study data set shows use of non-real-time data with nmap2: http://my.unidata.ucar.edu/modules.php?name=Downloads&d_op=viewsdownload&sid=19 Steve Chiswell >From: "seth.mcdowell" <address@hidden> >Organization: UCAR/Unidata >Keywords: 200307251758.h6PHwYLd013251 >Thank you for the previous help, though now there's another set of questions >arising. I have looked through the GemPak manual (version 5.6.g) for >information regarding the conversion of the resulting GemPak data file into a >form useful by programs such as nmap/nmap2 or ntrans, possibly other prorgams >as well. > >Seth McDowell > > >>===== Original Message From Unidata Support <address@hidden> ===== >>Seth, >> >>Use dcgrib2 (use of dcgrib is depricated). >>I unzipped your file, then ran: >>cat pgbexample | dcgrib2 -v 1 -d - YYYYMMDDHH_###_@@@.gem >>The above decoded 140 grids on NCEP grib #002 (2.5x2.5 degree global). >> >>Or....you can run nagrib, specifying the ncarncep1.tbl reanalysis parameter >>tables as shown below. >> >> GBFILE GRIB data file name pgbexample >> INDXFL GRIB index file name >> GDOUTF Output grid file testme.gem >> PROJ Map projection/angles/margins|dr >> GRDAREA Area covered by grid >> KXKY Number of grid points in x;y >> MAXGRD Maximum number of grids 200 >> CPYFIL Grid file whose navigation is to gds >> GAREA Graphics area dset >> OUTPUT Output device/filename t >> GBTBLS Input GRIB decoding tables >ncarncep1.tbl;ncarncep1.tbl;vcrdgrib1.tbl >> GBDIAG GRIB diagnostic elements >> PDSEXT PDSEXT Y or N, add PDS extens NO >> Parameters requested: GBFILE,INDXFL,GDOUTF,PROJ,GRDAREA,KXKY,MAXGRD,CPYFIL, >> GAREA,OUTPUT,GBTBLS,GBDIAG,PDSEXT. >> GEMPAK-NAGRIB> >> >> >>In general, using nagrib on the reanalysis files would be preferable since >you can >>specify which parameters tables you want to use. >> >>Steve Chiswell >> >> >>>From: "seth.mcdowell" <address@hidden> >>>Organization: UCAR/Unidata >>>Keywords: 200307142007.h6EK7jLd009408 >> >>>Hello, I am a student at Western Kentucky University. Our center has gempak >>>for us to use, and we have some NCEP-NCAR reanalysis data sets. I tried >>>converting these with dcgrib, but to no avail. The grib files are not >supposed >>> >>>to be in gaussian mode, but perhaps they are? >>> >>>http://geocities.com/sethmcdoogle/pgb.zip is an example file. >>> >>>Thanks in advance, >>>Seth McDowell >>> >> >>**************************************************************************** >< >>Unidata User Support UCAR Unidata Program >< >>(303)497-8643 P.O. Box 3000 >< >>address@hidden Boulder, CO 80307 >< >>---------------------------------------------------------------------------- >< >>Unidata WWW Service http://my.unidata.ucar.edu/content/support >< >>**************************************************************************** >< >