[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

20030923: 20030923: nex2img stuff

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: 20030923: 20030923: nex2img stuff
  • Date: Tue, 23 Sep 2003 12:56:15 -0600
Daryl,

Gotcha now.

Yes, you can add entries for the velocity products and use the nex2img
program to remap and convert to GIF images. 

Steve



>From: Daryl Herzmann <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200309231832.h8NIWYk1021933

>Hiya UNIDATA,
>
>Thanks for your comments.  I think I poorly phrased my second question.
>
>On Tue, 23 Sep 2003, Unidata Support wrote:
>
>>As for 2), A composite of radial velocity is not really meaningful.
>>It is only the radial component. The tangential wind is not provided.
>>This is not a dual-doppler analysis - which can be done with the
>>level II data-- NIDS images are just data bins. You could estimate
>>U & V components along the bisection of the overlap regeion, but otherwise 
>>would be indeterminant (note that "away" values from one radar would be 
>>"toward" values in an adjacent image.
>
>I completely agree.
>
>>>From: Daryl Herzmann <address@hidden>
>>>Organization: UCAR/Unidata
>>>Keywords: 200309231418.h8NEIek1011225
>>>
>>>2.  Does nex2img 'do the right thing' when it comes to velocity 
>>>    products? I realize compositing them is a beast, but most folks
>>>    just want to generate a single site geotiff.  Looking at the 
>>>    nex2gini.tbl, I notice a lack of velocity products.  Can I 
>>>    just add them in there?
>
>I realize compositing is not meaningful.  I don't want to composite the 
>velocity data, but I want to use nex2img to create single site 
>georeferenced TIFs.  I have active interest from the DMX and OAX offices 
>to produce single site SRM plots in geotiff format.  Can I update 
>nex2gini.tbl with the velocity entries and have nex2img 'do the right 
>thing'? :)  I am already generating single site geoTiffs of the n0r 
>product.  That works great!
>
>The WFO offices want to be able to download historical SRM geotiffs and 
>put them into ArcPad and other GIS products.  They can then look at the 
>SRM to determine areas they should look for storm damage and they want 
>something to compare the SRM with storm damage they survey.  With GIS, 
>they can do all of this in the field on their handheld!
>
>Regarding the userComm meeting report.  I have gotten quite a bit of 
>feedback from the Mapserver community regarding this product.  I think it 
>has given a lot of visibility to UNIDATA and GEMPAK.   I hope it hasn't 
>generated too many support@ questions!
>
>Sorry for the poorly worded question,
>  Daryl
>
>-- 
>/**
> * Daryl Herzmann (address@hidden)
> * Program Assistant -- Iowa Environmental Mesonet
> * http://mesonet.agron.iastate.edu
> */
>
>