Re: Front end GUI or Widet?

From: Arindam Chakraborty <arindam_at_nyahnyahspammersnyahnyah>
Date: Thu, 12 Jul 2007 12:56:28 -0400
hi Saji,
    it'll be really great to have an interactive tool like that on top of NCL's powerful functions.

regards,

arindam

Saji Njarackalazhikam Hameed wrote:
Michael,

I have been trying to do something like this for my use. I worked on 
two types of mechanisms.

  1. A set of routines would help to interactively subset and plot as you do
     in grads.

     I usually open a netcdf data and with the use of this library and 
      can say things like
     setlat(-30,30)
     or
     settime("1Jun1999,20Jun1999")
     etc

    and do things like
    shaded(sst) or contour(sst)

    This routines are not so well developed and needs lot of working.
    But I can send it to you over the weekend if you are interested.

2. The second way is not really for interactive plotting. It was developed
   as part of an automated climate monitoring system. In this case we
   set up a data base with some predefined conventions and structure.
   By data base I mean just a flat data base (none of the SQL stuff). 
   All data is ordered with a particular structure-
   For instance TMI/Mean/2007/sst.nc or NCEP/Anomaly/2007/hgt_1000.nc

   We then use an interface to retrieve data in a relatively painless way
  
   For instance to get a time series of TMI SST anomalies area-averaged
   between 30 S and 30 N and 40 E to 120 E, we could say

   opt=True
   opt@DataSource="TMI"
   opt@DataType="Anomaly"
   opt@DataPeriod=(/"1Jan1997,31Jan2007"/)
   opt@Lat=(/-30,30/)
   opt@LatAve=True
   opt@Lon=(/40,120/)
   opt@LonAve=True
   var=sliceData(opt) ; returns sst averaged over tropical Indian Ocean
                        for period 1Jan1997 to 31Jan2007.

If these are of interest to you, please let me know.

saji

* Michael Uddstrom <m.uddstrom@niwa.co.nz> [2007-07-12 17:02:24 +1200]:

  
 Perhaps a dumb question - but...

 Has anyone built a gui to sit on top of ncl, so that it is easy to 
 interactively select and display fields in a file (or files) - a bit like a 
 "super ncview" application.

 If not (which we suspect might be the case) what would you suggest (GrADS, 
 IVE, ...?)

 Thanks very much for your help

 Michael

 -- 
 Dr. Michael J. Uddstrom
 Science Leader: Environmental Forecasting
 Principal Scientist: Meteorology and Remote Sensing
 National Institute of Water and Atmospheric Research
 Private Bag 14-901, Wellington, New Zealand
 DDI: +64 4 386 0365, 	Fax: +64 4 386 2153,
 Home: +64 4 478 9734
 http://www.niwa.co.nz/
    


  
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-- 
----------------------------
 ARINDAM CHAKRABORTY
 Department of Meteorology
 Florida State University
 Tallahassee, FL-32306, USA
 Tel: +001-850-6443524 (Off)
      +001-850-5758550 (Res)
 Fax: +001-850-6449642
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Received on Thu Jul 12 2007 - 10:56:28 MDT

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