[GEMPAK #WDB-634752]: question about grphgd

Hi Sarah,

I don't have an answer for you yet, but will look at it again today and see if 
I can find something.  Thing is, grphgd uses a VGF file as input, allows user 
modifications and additions, then converts it to a grid.  So if you want 
probability contours of 6, 7, 8%, etc., you'll need to draw them yourself while 
in step 4.  I think this may be the reason I wasn't sure where to go with your 
question before. grphgd will not create the contours itself, only convert a 
user-generated VGF file into a grid file.

Michael




> Hi Michael,
> 
> Just wondering if you had any suggestions about my problem with contouring
> continuous probabilities for SPC severe weather outlooks.
> 
> It might be easier to use AWIPS (GFE) for this function; it's just at the
> national centers, we use NAWIPS. We are supposed to switch over to AWIPS2
> though, at some point.
> 
> Sarah
> 
> 
> 
> On Mon, Oct 1, 2012 at 10:13 AM, Sarah Taylor <address@hidden> wrote:
> 
> >
> > Hi Michael,
> >
> > I am using the nmap2 product generation to invoke graph to grid.
> >
> > http://www.unidata.ucar.edu/software/gempak/tutorial/nmap_pgen_grid.html
> > It's step 5.
> >
> > Then, here is how a "normal" probability file looks. These settings will
> > produce a graphic that looks like this:
> > http://www.spc.noaa.gov/products/outlook/day1probotlk_1300_wind.gif
> >
> > What I want is to have continuous probabilities, where the grphgd program
> > would contour the 5, 6, 7, 8, 9, 10, 11, 12, 13,14% probabilities between
> > the 5 and 15% contour lines.
> >
> > So here are the settings from where I started editing:
> >
> > gdoutf= wind.grd
> >
> > maxgrd= 10
> >
> > glevel= 0
> >
> > keycol=0
> >
> > histgrd= yes
> >
> > type=f
> >
> > catmat= 5%=5; 10%=10; 15%=15; 30%=30; 45%=45
> >
> > dlines= yes
> >
> > fint= 5; 10; 15; 30; 45; 60
> >
> > clrbar= 1
> >
> > gglims= 0; 0 || 0.0
> >
> > bounds = outlook < area < outlook
> >
> > discrete= -5=0; 5-9=5; 10-14=10; 15-29=15; 30-44=30;
> >
> > fline= 0; 11; 12; 13; 15; 14; 16
> >
> > gfunc=probwind
> >
> > gvcord= none
> >
> >
> > ---------------------------------------------------------
> >
> > Those are the settings, again for this file:
> > http://www.spc.noaa.gov/products/outlook/day1probotlk_1300_wind.gif
> >
> > I've tried tweaking the cint parameter...
> >
> > cint= 5; 6; 7; 8; 9; 10;
> >
> > This just cluster line contours around the 5% line...
> >
> > I've tried tweaking the fint parameter in the same way:
> >
> > fint= 5; 6;7;8;9;10;
> >
> > There are different fill colors, but they are clustered around the 5 or
> > 15% lines, not smoothly spaced out.
> >
> > I tried setting discrete = (blank)
> >
> > This just allows other areas of the conus, not in a probability contour to
> > "bleed" out.
> >
> >
> >
> > Good luck - and hope this makes some sense-
> >
> > Thanks,
> > Sarah
> >
> >
> >
> >
> > address@hidden> wrote:
> >
> >> Hi Sarah,
> >>
> >> I received the VGF files and gave them a try but didn't get far before
> >> getting lost in some other work :)
> >>
> >> I assume you are running grphgd from the command line?  What are you
> >> using for GFUNC, GDATTIM, GVCORD and GLEVEL?  Can you copy/paste the GRPHGD
> >> variables as you're using them?  This is probably just an issue with how
> >> variables are defined in the program and not with your files, but in any
> >> case, I need to try to reproduce exactly what you're doing to see if I can
> >> tweak it some and get it to work.
> >>
> >> Michael
> >>
> >>
> >> > Hi Michael,
> >> >
> >> > Were you able to receive the .gem files I sent you on Monday?
> >> >
> >> > Thanks!
> >> >
> >> > Sarah
> >> >
> >>
> >> Ticket Details
> >> ===================
> >> Ticket ID: WDB-634752
> >> Department: Support GEMPAK
> >> Priority: Normal
> >> Status: Open
> >>
> >>
> >
> 
> 


Ticket Details
===================
Ticket ID: WDB-634752
Department: Support GEMPAK
Priority: Critical
Status: Open