20020930: Grid File Format

Anthony,

The gempak format is specific to the software package. All the
access routines are located within the $GEMPAK/source/gemlib
(and specifically in the dm (data management) layer)
routines.

Steve Chiswell


>From: Anthony B Tang <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200210010000.g9100h112053

>Steve,
>
>THANK YOU very much. 
>
>I have another question, when we decode the file using dcgrib2, we decoded it
>into a .gem file -- is this .gem file format somewhere on the web that we can
>have a look at? Thanks.
>
>=-Anthony
>--- Unidata Support <address@hidden> wrote:
>> 
>> 
>> Anthony,
>> 
>> in gdinfo, use:
>> GDFILE = your_ruc_grid_file (not the hrcbob file below)
>> GLEVEL = all
>> GVCORD = all
>> GFUNC = all
>> GDATTIM = all
>> 
>> at the gdinfo prompt you can use:
>> restore defaults/gdinfo
>> to get the "all" values filled in above.
>> 
>> In gdlist, be careful not to use gdattim=last if you don't 
>> know what the last time in the data set is.
>> 
>> Steve CHiswell
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> >From: Anthony B Tang <address@hidden>
>> >Organization: UCAR/Unidata
>> >Keywords: 200209302012.g8UKCg119125
>> 
>> >Steve,
>> >
>> >Sorry about the last message, I didn't read close enough. I looked over the
>> >forums again to find that I needed to set defaults for gdinfo and gdlist.
>> >HOwever, they throw different errors now ::
>> >
>> >gdinfo ::
>> >
>> >annot open file \home\atang\GEMpak\gempak\data\hrcbob.grd.
>> > [DM -2]  File \home\atang\GEMpak\gempak\data\hrcbob.grd cannot be opened.
>> > [GD -2]  File \home\atang\GEMpak\gempak\data\hrcbob.grd cannot be opened.
>> > [FL -1]  Cannot open file \home\atang\GEMpak\gempak\data\hrcbob.grd.
>> > [DM -2]  File \home\atang\GEMpak\gempak\data\hrcbob.grd cannot be opened.
>> > [GD -2]  File \home\atang\GEMpak\gempak\data\hrcbob.grd cannot be opened.
>> > Parameters requested: GDFILE,LSTALL,OUTPUT,GDATTIM,GLEVEL,GVCORD,GFUNC
>> >
>> >
>> >gdlist::
>> >
>> >
>> > [TG -4]  No times in input file.
>> > [TG -4]  No times in input file.
>> > [GR -20]  No times selected.
>> > [GR -20]  No times selected.
>> > Parameters requested: GDATTIM,GLEVEL,GVCORD,GFUNC,GDFILE,GAREA,PROJ,SCALE,
>> > OUTPUT..
>> >
>> >I am not sure where those errors are occuring or where I set the path, but
>> the
>> >files are there in that exact path and I don't know why gdinfo and list
>> can't
>> >find them. I looked at Appendix D and Chapter 4 for information, but they
>> >aren't much help...
>> >
>> >Let me know what you think. Thanks!
>> >
>> >=-Anthony
>> >--- Unidata Support <address@hidden> wrote:
>> >> 
>> >> 
>> >> Use gdinfo to see what fields are present in your data set.
>> >> Some data sets, depending on where you are getting the data only
>> >> have surface fields. Use gdlist to verify that the data values exist.
>> >> 
>> >> Verify that dcgrib2 is finding the $GEMTBL/grid tables.
>> >> Check the decoder logs. Verify what grid projections you
>> >> are decoding (if more than 1 exists in your input data
>> >> set, use the @@@ template to ensure each projection goes
>> >> to a unique file , eg grids 236 40km and 252 20km should be sent to
>> >> different output files).
>> >> 
>> >> Steve Chiswell
>> >> 
>> >> >From: Anthony B Tang <address@hidden>
>> >> >Organization: UCAR/Unidata
>> >> >Keywords: 200209301837.g8UIbt114439
>> >> 
>> >> >Okay,
>> >> >
>> >> >I fixed the last problem. I not sure what happened either. I just
>> recompile
>> > d
>> >> >and everything worked again. 
>> >> >
>> >> >Here's another one. I am loading a RUC2 grib file which I used dcgrib2 t
> o
>> >> >convert to GEMPak's format. When I convert it, everything goes successfu
> l
>> >> and
>> >> >there are no errors. 
>> >> >
>> >> >However, when I go into the GEMPAK display, I am only view a few weather
>> >> data
>> >> >and not all of them. The caption on the bottom text field says they are
>> >> being
>> >> >displayed, but I don't see anything. I used grib dump and there is data
>> in
>> >> >those fields, but I can't see a display.
>> >> >
>> >> >Do you know what is wrong? Thanks. I read all the forums messages about
>> RUC
>> > 2
>> >> >and didn't find a message similiar to this one.
>> >> >=-Anthony
>> >> >--- Unidata Support <address@hidden> wrote:
>> >> >> >From: Anthony B Tang <address@hidden>
>> >> >> >Organization: UCAR/Unidata
>> >> >> >Keywords: 200209280053.g8S0rD107969
>> >> >> 
>> >> >> >Hello, 
>> >> >> >
>> >> >> >I'm having a small problem with GEMpak. First of all, I've got it to
>> wor
>> > k
>> >> o
>> >> > n
>> >> >> m
>> >> >> > y
>> >> >> >system (RH7.3) before, but now, I still got it working, but it's got 
> a
>> >> comb
>> >> > o
>> >> >> >box problem. The problem is that when I click on a combo box (the lis
> t
>> >> box
>> >> >> tha
>> >> >> > t
>> >> >> >drops down) it stays there and I am unable to select anything. I can
>> >> close
>> >> >> the
>> >> >> >window, but it's still glued open and I still cannot select anything.
>> Do
>> >> yo
>> >> > u
>> >> >> >know what is wrong?
>> >> >> >
>> >> >> >=-Anthony
>> >> >> >
>> >> >> >__________________________________________________
>> >> >> >Do you Yahoo!?
>> >> >> >New DSL Internet Access from SBC & Yahoo!
>> >> >> >http://sbc.yahoo.com
>> >> >> >
>> >> >> 
>> >> >> Anthony,
>> >> >> 
>> >> >> No clue as to which program you are talking about, and which menus you
>> >> >> may be talking about. Please provide more details.
>> >> >> 
>> >> >> Steve CHIswell
>> >> >>
>> >>
>> ****************************************************************************
>> >> >> Unidata User Support                                    UCAR Unidata
>> >> Program
>> >> >> (303)497-8643                                                  P.O. Bo
> x
>> >> 3000
>> >> >> address@hidden                                   Boulder, CO
>> >> 80307
>> >> >>
>> >>
>> ----------------------------------------------------------------------------
>> >> >> Unidata WWW Service                        http://www.unidata.ucar.edu
> /
>>  
>> >  
>> >>  
>> >> >>
>> >>
>> ****************************************************************************
>> >> ><
>> >> >
>> >> >
>> >> >__________________________________________________
>> >> >Do you Yahoo!?
>> >> >New DSL Internet Access from SBC & Yahoo!
>> >> >http://sbc.yahoo.com
>> >> >
>> >> 
>> >>
>> ****************************************************************************
>> >> Unidata User Support                                    UCAR Unidata
>> Program
>> >> (303)497-8643                                                  P.O. Box
>> 3000
>> >> address@hidden                                   Boulder, CO
>> 80307
>> 
>=== message truncated ===
>
>
>__________________________________________________
>Do you Yahoo!?
>New DSL Internet Access from SBC & Yahoo!
>http://sbc.yahoo.com
>