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[GEMPAK #WZD-275174]: grid size limitations

Hi Don,

That's odd behavior but I'm going to guess that the reason LLMXGD = 2000000 
didn't work is somewhere in the code is a check that LLMXGD does not exceed 
another parameter, and   LLMXGD = 1000000 is low enough to be allowed.  Just a 
guess, I'll need more time to investigate this.

Thanks for reporting back.

Michael



> Michael
> 
> Thanks for your solution. I couldn't follow your instructions exactly
> because I am running GEMPAK6.6.0. I edited four files to change LLMXGD to
> 2000000...gemprm.h, MCHPRM.Linux, MCPRM.Linux_gfortran, and
> MCHPRM.Linux.gfortran. (I'm running gempak on openSUSE 12.1 (x86_64)). I
> then followed your instructions in compiling and installing gdbiint. It
> worked great on my large model file.
> 
> However, when I ran gdbiint on other model gridfiles, the program didn't
> interpolate any grids. It stopped after printing the first two lines.
> 
> I changed LLMXGD back to 1000000 and recompiled. (Actually, I saved the
> large-version binary with a different name.) That didn't help any at all. I
> get the same results...it works on the large model grid, but not the smaller
> grids.
> 
> Obviously, I broke something. I'll delve into the gdbiint.f code to try to
> figure it out. I'd appreciate any expertise you have.
> 
> Don
> 
> -----Original Message-----
> From: Unidata GEMPAK Support [mailto:address@hidden]
> Sent: Tuesday, July 23, 2013 3:16 PM
> To: address@hidden
> Cc: address@hidden
> Subject: [GEMPAK #WZD-275174]: grid size limitations
> 
> Hi Don,
> 
> I do not have a way around this without increasing LLMXGD and rebuilding
> GEMPAK.
> 
> I've updated the include files on the GEMPAK git repo and double LLMXGD to 2
> million.
> 
> I've attached a tarball archive of the full /GEMPAK6.8.0/gempak/include/
> contents.  With this replacement, you will need to rebuild GDBIINT before
> running again:
> 
> cd $GEMPAK/source/programs/gd/gdbiint/
> rm -rf $OS_LIB/gdbiint.a
> make all;make install
> 
> then re-run gdbiint in the directory or script you are using and check the
> results.
> 
> Michael James
> Unidata
> 
> 
> 
> > Hello
> >
> > I'm updating you on the status of my support request. Here are some of the
> > potential solutions that I looked into, but none of them work.
> >
> > 1. NAGRIB2 - This program has a GRDAREA variable that theoretically should
> > allow for subsetting the original grid into something manageable. I got a
> > "grid size too large" error which I assume is from the original grid which
> > is ~ 1,125,000 points.
> >
> > 2. GDBIINT - The program code doesn't have any grid size limitations, like
> > LLMXGD, but there is some grid size limitation built into the gempak
> > subroutines it calls. GDBIINT will interpolate correctly the area
> > represented by the first ~ 1000000 points, then it's garbage after that.
> >
> > 3. DCGRIB2 - This program has no options to subset the input grid. The
> > program documentation describes its ability to stitch grids together, but
> > there appears to be no option to do the opposite.
> >
> > So I am still at a loss for a solution to my problem.
> >
> > Don McCann
> > President, McCann Aviation Weather Research, Inc.
> >
> > -----Original Message-----
> > From: Unidata GEMPAK Support [mailto:address@hidden]
> > Sent: Thursday, July 18, 2013 3:39 PM
> > To: address@hidden
> > Subject: [GEMPAK #WZD-275174]: grid size limitations
> >
> >
> > Don,
> >
> > Your Ticket has been received, and a Unidata staff member will review it
> and
> > reply accordingly. Listed below are details of this new Ticket. Please
> make
> > sure the Ticket ID remains in the Subject: line on all correspondence
> > related to this Ticket.
> >
> > Ticket ID: WZD-275174
> > Subject: grid size limitations
> > Department: Support GEMPAK
> > Priority: Normal
> > Status: Open
> >
> >
> >
> > Please let us know how we can assist you further.
> >
> > Unidata User Support
> >
> >
> >
> >
> >
> 
> Ticket Details
> ===================
> Ticket ID: WZD-275174
> Department: Support GEMPAK
> Priority: Normal
> Status: Open
> 
> 
> 

Ticket Details
===================
Ticket ID: WZD-275174
Department: Support GEMPAK
Priority: Normal
Status: Open