[GEMPAK #CYW-235722]: gdcross question

Ah, I see, thanks.

Using your GDCROSS input I am seeing elevation between CWPL (391 m) and CYMO (9 
m) - see attached. 

This being a cross-section across Ontario, there's not much elevation to show.  
The filled contours are shown below the surface because of the cross-section 
interpolation.  If I expand CXSTNS out to LAX>BWI, there are grid points below 
the surface level which are not interpolated to, though there is some overlap 
(second attachment).

Are you using a different CXSTNS definition which does not show the surface?

-Michael

> Michael-
> I am simply using a nam212 gempak file within gdcross to plot potential 
> vorticity and theta. Parameter list is (note gvcord)
> 
> CXSTNS   = CWPL>CYMO
> GDATTIM  = f00
> GVCORD   = pres
> GFUNC    = pvor(thta,wnd)
> GVECT    =
> GDFILE   = /squall1/gempak-data/model/nam/2012111212_nam212.gem
> WIND     =
> REFVEC   = 10
> PTYPE    = log
> YAXIS    =
> IJSKIP   = 0
> CINT     =
> SCALE    = 6
> LINE     = 32/1/3
> BORDER   = 1
> TITLE    = 1/1
> CLEAR    = yes
> DEVICE   = gif|ago.gif|1200;900
> TEXT     = 1
> PANEL    = 0
> CONTUR   = 3
> FINT     = 1
> FLINE    = 13-30
> CTYPE    = f
> 
> Any other thoughts?
> 
> 
> --
> Darren R. Clabo
> South Dakota State Fire Meteorologist
> O: (605) 394-1996  M: (605) 381-9253
> address@hidden
> http://www.ias.sdsmt.edu/clabo/index.htm
> 
> -----Original Message-----
> From: Unidata GEMPAK Support [mailto:address@hidden]
> Sent: Tuesday, November 20, 2012 8:37 AM
> To: Clabo, Darren R.
> Cc: address@hidden
> Subject: [GEMPAK #CYW-235722]: gdcross question
> 
> I can confirm that the GDCROSS code is written to only draw surface elevation 
> when GVCORD is PRES.  I'm trying to make it work for HGHT and THTA but so far 
> it's not an easy task.  Not the news you wanted to hear, sorry.
> 
> Michael
> 
> > Hi Darren,
> >
> > Without seeing the GDCROSS input I'm making a guess about how you went 
> > about this.  Did you run GDVINT to interpolate to theta levels and then run 
> > this new grid file through GDCROSS?
> >
> > I see what you describe when I plot a linear cross-section of temperatures 
> > by the HGHT coordinate, though there are only 6 HGHT levels for TMPK in the 
> > GFS, so the scope is limited, but it does not show a surface elevation 
> > cross-section at the bottom, like you say.
> >
> > I'm guessing that surface elevation is only designed to show for 
> > GVCORD=PRES.  I'm looking at the source code and will see if I can get it 
> > to work with height.
> >
> > -Michael
> >
> >
> >
> > > Good day-
> > > I am working on putting together an isentropic analysis in GDCROSS. 
> > > However, when I am plotting a cross section from across the CONUS, all of 
> > > the stations are showing data down to 1000 mb. Considering the elevation 
> > > of the Intermountain West, I was hoping I could get a plot that resembles 
> > > what is found on the GEMPAK tutorial page 
> > > (http://www.unidata.ucar.edu/software/gempak/tutorial/vertical_plotting.html#12.2)
> > >  where the surface elevation is easily seen.
> > >
> > > Any thoughts on what I can do?
> > >
> > > --
> > > Darren R. Clabo
> > > South Dakota State Fire Meteorologist
> > > O: (605) 394-1996  M: (605) 381-9253 address@hidden
> > > http://www.ias.sdsmt.edu/clabo/index.htm
> > >
> > >
> > >
> >
> 
> 
> Ticket Details
> ===================
> Ticket ID: CYW-235722
> Department: Support GEMPAK
> Priority: Normal
> Status: Open
> 
> 


Ticket Details
===================
Ticket ID: CYW-235722
Department: Support GEMPAK
Priority: Normal
Status: Open

Attachment: thta.gif
Description: GIF image

Attachment: thta_2.gif
Description: GIF image