[
Date Prev][
Date Next][
Thread Prev][
Thread Next][
Date Index][
Thread Index]
20000810: Using gfunc = vor(wnd)
- Subject: 20000810: Using gfunc = vor(wnd)
- Date: Thu, 10 Aug 2000 16:02:21 -0600
Chris,
The VORWND name is the internam name that gempak creates when it
performes the calculation (and will use that as the title, unless you
give it a more descriptive TITLE.
The problem I believe you have is that you have SCALE=0 while vorticity values
are typically on the order of 10^-5. I suggest you set SCALE=999 or
SCALE= , rather than SCALE=0 so that gempak will appropriately scale the
data values for CINT to contour. With SCALE=0, you probably have
vcalues like MAX=0.00020 MIN=-0.00010, so the output just shows 0.00.
Steve Chiswell
Unidata User Support
>From: address@hidden (Chris Hennon)
>Organization: UCAR/Unidata
>Keywords: 200008102005.e7AK5YT16451
>Steve -
>
>I'm trying to produce a relative vorticity map. In my gempak grid file
>(vorticity.grd) I have these two grids:
>
>289 950812/0000 850 PRES UWND
>290 950812/0000 850 PRES VWND
>
>My GDCNTR input looks like:
>
> GDATTIM Grid date/time 950812/0000
> GLEVEL Grid level 850
> GVCORD Grid vertical coordinate PRES
> GFUNC Scalar grid vor(wnd)
> GDFILE Grid file vorticity.grd
>
>etc.....
>
>When I run it, gempak interprets vor(wnd) as the parm VORWND and therefore
>doesn't plot anything:
>
> GEMPAK-GDCNTR>r
>
> Grid file: vorticity.grd
>
> GRID IDENTIFIER:
> TIME1 TIME2 LEVL1 LEVL2 VCORD PARM
>950812/0000 850 PRES VORWND
>
> GAREA: dset
>SCALE: 0
>
> MINIMUM AND MAXIMUM VALUES 0.00 0.00
>
>
>Am I doing something obviously wrong? Thanks.
>
>Chris
>
>
>================================================
>| Chris Hennon Ohio State University |
>| Tropical Meteorology address@hidden |
>| |
>| Dept of Geography Office: 1155 Derby Hall |
>| 1036 Derby Hall Phone : (614) 292-2704 |
>| Columbus, OH 43210 Fax : (614) 292-6213 |
>================================================
>
