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19991103: ncdump differences in output

Matt,

From Steve Emmerson's reply to you regarding the ncdump output,
it is up to the application program that would display the image to
handle the image values as unsigned. The CDL which created the file does not
provide that metadata. 

Regarding conversion software, I do not have any software to convert 
for Gempak- but it should be relatively easy to write a program which
dumps the NetCDF file to a GINI format image which GEMPAK can plot.
You would have to create the GINI image header from the projection
information in the NetCDF file. The image values in a GINI are
simply the raster values.

Steve Chiswell




>From: Matthew Bunkers <address@hidden>
>Organization: .
>Keywords: 199911031104.EAA17942

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>---------------------------- Forwarded with Changes --------------------------
> -
>From: Matthew Bunkers at W-CR-UNR
>Date: 11/1/99 11:14AM
>To: address@hidden at EXTERNAL
>Subject: Re: 19991029: ncdump differences in output
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> -
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>--PART.BOUNDARY.noaamh2.4ef9.38201692.0001
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>
>     Steve,
>     
>     Attached are two files which were obtained from performing an ncdump 
>     command on the same file for a UNIX machine (ncdump1.txt) and a 
>     Solaris machine (ncdump2.txt).  Please note, only the beginning of 
>     the output is presented, but it illustrates the differences.
>     
>     On a different note, is there a utility that converts a netCDF image 
>     file to GEMPAK format?
>     
>     Matt
>     
>     
>______________________________ Reply Separator _______________________________
> __
>Subject: 19991029: ncdump differences in output
>Author:  address@hidden at EXTERNAL 
>Date:    10/30/1999 10:27
>     
>     
>>Organization: .
>>Keywords: 199910291835.MAA17383
>>To: "Matthew J. Bunkers" <address@hidden> 
>>cc: address@hidden
>>Subject: 19991029: ncdump differences in output 
>>Date: Fri, 29 Oct 1999 12:35:46 -0600
>>From: Unidata Support <address@hidden> 
>>
>>>From: "Matthew J. Bunkers" <address@hidden> 
>>>Organization: .
>>>Keywords: 199910291801.MAA16406
>>
>>>Hello.  I work at the NWS in Rapid City, SD and was working with the ncdump 
>>>command on our AWIPS system.  In particular, I was looking at the contents o
> f 
>>>our netCDF satellite images.  The values ranged from the -100s to the +100s.
>  
>>>However, when I took the same files down to the School of Mines computer 
>>>lab, the results from the ncdump command were different.  They were all 
>>>positive and different by 256 (bits, I assume).  For example, a -112 pixel v
> al
>>> ue
>>>at the NWS became a 144 pixel value at the school.  What is going on here? 
>>>
>>>Thank you.
>>>
>>>Matt Bunkers, NWS Rapid City, SD
>>>
>>
>>
>>Matt,
>>
>>Without any information on your CDL, I cannot tell you what 
>>is the cause of your apparent discrepancy.
>>
>>Perhaps you can provide some listings that show how you arrived at 
>>the above statements.
>>
>>Steve Chiswell
>>**************************************************************************** 
> < 
>>Unidata User Support                                    UCAR Unidata Program 
> < 
>>(303)497-8644                                                  P.O. Box 3000 
> < 
>>address@hidden                                   Boulder, CO 80307 
> < 
>>---------------------------------------------------------------------------- 
> < 
>>Unidata WWW Service                        http://www.unidata.ucar.edu/      
> < 
>>**************************************************************************** 
> < 
>>
>
>--PART.BOUNDARY.noaamh2.4ef9.38201692.0001
>Content-Type: application/octet-stream; name="ncdump2.txt"
>Content-Transfer-Encoding: base64
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>Content-Description: ncdump2.txt
>FTBP-Modification-Date: 03 Nov 1999 11:03:00 Z
>FTBP-Object-Size: 1992
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>--PART.BOUNDARY.noaamh2.4ef9.38201692.0001
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>--PART.BOUNDARY.noaamh2.4ef9.38201692.0001--
>