flow vectors from regular u and v arrays (fwd)

[Robb Kambic]

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Robb Kambic        			   Unidata Program Center
Software Engineer III			   Univ. Corp for Atmospheric Research
rkambic at unidata.ucar.edu		   WWW: http://www.unidata.ucar.edu/
==============================================================================

---------- Forwarded message ----------
Date: Tue, 27 Feb 2007 19:07:18 +0100
From: Murray Brown <murraybr at bellsouth.net>
To: dmurray at unidata.ucar.edu, satmet.hp <satmet.hp at ticino.com>
Subject: Re: flow vectors from regular u and v arrays

I have a simple Surfer ASCII grid to NetCDF converter if anybody is interested. 
It's new, and needs testing.

We typically make U and V grids in Surfer, followed by arrow plots in Surfer 
also.  I don't see why you couldn't also use these for a NetCDF route.

If you're looking for good candidate ASCII grid formats to convert to NetCDF, 
Surfer is obviously a priority, IMHO, and ESRI ArcGrid comes next (ASCII and 
binary flavors).

Murray Brown


----- Original Message ----- From: "Don Murray" <dmurray at unidata.ucar.edu>
To: "satmet.hp" <satmet.hp at ticino.com>
Sent: Tuesday, February 27, 2007 3:40 PM
Subject: Re: flow vectors from regular u and v arrays


> Hi HP-
> 
> satmet.hp wrote:
> 
>> I have files with the u resp v components of regularly spaced wind vectors 
>> (ASCII arrays). How can I construct flow vectors.
> 
> There is no direct ASCII grid reader in the IDV, but it is
> on our list of things to do.  The big problem is deciding on
> a format.  The underlying VisAD library has a method for reading
> ASCII grids and we are looking at using that as well as a
> netCDF-Java IOSP.
> 
> There are a couple of options:
> 
> - use the VisAD text reader and then try to display the
> resulting data structure using the Any Field formula and
> selecting a flow display.
> 
> - use the GEON-IDV ASCII->netCDF converter described at:
> 
> http://geon.unavco.org/unavco/IDV_for_GEON_data_converters.html
> 
> Stu Wier might want to chime in on this since he's the one
> who developed it.
> 
> Can you send a sample file to support-idv?
> 
> Don
> *************************************************************
> Don Murray                               UCAR Unidata Program
> dmurray at unidata.ucar.edu                        P.O. Box 3000
> (303) 497-8628                              Boulder, CO 80307
> http://www.unidata.ucar.edu/staff/donm
> *************************************************************
> 
>