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[GEMPAK #KZF-431851]: GDPOINT: WInd speed consistently 1/2 chart value

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  • Subject: [GEMPAK #KZF-431851]: GDPOINT: WInd speed consistently 1/2 chart value
  • Date: Mon, 02 Nov 2009 16:39:35 -0700
Mark,

I believe the issue here is that the gridded data are in knots while GDPOINT 
automatically converts them to meters per second, the conversion is roughly 
2-to-1.  To plot in unit knots use GFUNC = kntv(wnd)

Michael


> Full Name: Mark Hughes
> Email Address: address@hidden
> Organization: Global Weather Dynamics, Inc
> Package Version:
> Operating System:
> Hardware:
> Description of problem:
> 
> Hi,
> 
> I am working with gdpoint on grids produced from GRIB data.  I have
> wind charts in production and they are essentially identical to those
> produced by WAFC Washington.
> 
> I have an application requiring point data from the grid.  GDPOINT used
> to extract wind direction matches the chart.  Wind magnitude is always
> 1/2.  I know it is a units problem.  Can you tell me what I am
> missing?
> 
> Thanks,
> 
> Mark Hughes
> Global Weather Dynamics
> 
> 


Ticket Details
===================
Ticket ID: KZF-431851
Department: Support GEMPAK
Priority: Normal
Status: Open