[gradsusr] Regridding/Replace Value Question

[Andrew Revering]

This is perfect -- EXCEPT -- that what I'm doing is actually using GrADS (or
maybe its OpenGrads, I'm not sure) to regrid the data into a new netCDF
file. I'm not using GrADS itself for display until after I've combined
several NetCDFs into one large NetCDF file. The point of this is so that I
can properly overlay data at the same points (radar data..overlaying
overlapping radar sites).

 

. so right now I'm looking at the data and choosing which value to use at a
specific coordinate given multiple radar sites, but I don't know that I can
identify what the coordinate is of the data point I'm looking at using re().
Maybe I'm just not using it properly.

 

What I want to do is know the actual coordinate so I can identify how far
away it is from the radar site, and then with that information decide if I
want to identify the return for that point as ground clutter and set its
value to 0.

 

So in short.. I need something like defval, but I need to be able to do it
during the regridding process, not involving the display in GrADS. I want to
do it before I write out the final NetCDF.

 

Thoughts?

 

 

 

From: gradsusr-bounces at gradsusr.org [mailto:gradsusr-bounces at gradsusr.org]
On Behalf Of Stephen McMillan
Sent: Friday, June 11, 2010 7:00 AM
To: GrADS Users Forum
Subject: Re: [gradsusr] Regridding/Replace Value Question

 

Andy,

Check out the 'set defval...' command in the documentation index:
http://www.iges.org/grads/gadoc/gradcomdsetdefval.html

I believe it will do what you want.

 

Stephen McMillan

On Thu, Jun 10, 2010 at 10:33 PM, Andrew Revering <andy at f5data.com> wrote:

Is there a way to replace a grid value during the regridding process using
're()' or similar function?

 

I need to be able to return a specific coordinate (latitude/longitude) for
the point we're regridding, along with it's value and then be able to change
the value at that point.

 

Andy

 

 


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