[ncl-talk] ncl-talk Digest, Vol 130, Issue 1

[Alessandra Giannini]

Hi Geeta, 

NCL is telling you what may be wrong…

Either your filename is slightly off: 

in your script you call a file by the name "2A12.20100702.71931.6.HDF", but when you list, you have a file with a 7 at the end, instead of a 6: "2A12.20100702.71931.7.HDF"

Or there is no variable called "geolocation" in the file you are reading from.

What are latitude and longitude called in the file?

best, alessandra





-- 
Alessandra Giannini
IRI for Climate and Society - The Earth Institute at Columbia University
P.O. Box 1000, Palisades NY 10964-8000
phone/fax: +1 845 680-4473/4864 - email: alesall at iri.columbia.edu

On Sep 2, 2014, at 6:21 AM, Geeta Geeta <geetag54 at yahoo.com> wrote:

> Hi .
> I am trying to plot the data in HDF format using NCL.
> 
> I happen to see the ready script available https://www.ncl.ucar.edu/Applications/Scripts/hdf4sds_6.ncl which reads HDF data.
> 
> On my system I downloaded this script and tried to run this but when I run this, following message comes.
> bash-3.2$ ncl hdf4sds_6.ncl
>  Copyright (C) 1995-2007 - All Rights Reserved
>  University Corporation for Atmospheric Research
>  NCAR Command Language Version 5.0.0
>  The use of this software is governed by a License Agreement.
>  See http://www.ncl.ucar.edu/ for more details.
> fatal:_NclCreateFile: Requested file does not exist as (./2A12.20100702.71931.6.HDF) or as (./2A12.20100702.71931.6), can't add file
> fatal:Either file (f) isn't defined or variable (geolocation) is not a variable in the file
> fatal:Execute: Error occurred at or near line 31 in file hdf4sds_6.ncl
>  
> bash-3.2$ ls -l *HDF*
> -rw-r--r--    1 model    staff      55092053 Sep 01 15:54 2A12.20100702.71931.7.HDF
> -rw-r--r--    1 model    staff      55092079 Aug 12 11:13 2A12.20130523.88390.7.HDF
> -rw-r--r--    1 model    staff      55092085 Aug 12 15:27 2A12.20140602.94247.7.HDF
> bash-3.2$ ls -l *hdf*ncl*
> -rw-r--r--    1 model    staff          6725 Sep 01 17:01 hdf4sds_6.ncl
> bash-3.2$
> 
> The files exist in my directory.
> Can somebody tell me what's mistake???
> Geeta.
> 
>  
> 
> 
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