Re: [gembud] nex2gini question(s)

Pete, 

To run nex2gini, the GFUNC variable is used as the %PROD% parameter name
in the search for available files.

The nex2gini phelp shows the use of GFUNC=N0R, which then would look for
files named $RAD/NIDS/%SITE%/N0R/N0R_YYYYMMDD_HHNN
The datatype.tbl template is used so that each %SITE% within the
provided nexrad.tbl file can be search for within the specified time
range where
the site id is part of the directory structure provided by the template.

The N0R string will not match your BREF_1.00 string, so you are not
finding
any files that match the criteria, and therefore the blank product. The
N0R string
is part of the PIL identifier in NOAAport, so provides a convenient way
to file
the data from the LDM. If you are using BREF as a convention, you will
have to adjust the GFUNC name accordingly, but I would suggest not using
the
"_" character within your parameter name since it may confuse the
parsing of the other fields. Eg, use BREF1/BREF1_YYYYMMDD_HHNN with
GFUNC=BREF1.

The output file is creates in the current directory if no other file
path is given.
The datatype.tbl file is used for template matching of input data, but
not used
in any way for creation of your output file.

As for file size, when COMPRESS=NO, a standard GINI format file is
created.
The KXKY=4736;3000 is a raster of 14,208,000 points, so your output file
will be that many bytes, plus 512 bytes of header information. Using 
COMPRESS=yes will use PNG compression for the raster portion, and
depending
on the actual data, will compress to around 2MB.


On Tue, 2007-11-27 at 14:19 -0500, address@hidden wrote:
> 
> Hi.. 
> 
> I am getting a blank composite image when running nex2gini (I am a
> nex2gini newbie) 
> 
> Here are the vitals: 
>       * Running nex2gini using GEMPAK 5.10.2 on a system with RH WS 4 
>       * Two images - $RAD/NIDS/CLE/BREF_1.00/BREF_1.00_20071126_1806
>         and $RAD/NIDS/ILN/BREF_1.00/BREF_1.00_20071126_1806 are
>         displayable in NMAP2 and both contain reflectivity data in
>         precip mode 
>       * Settings are identical to those provided by typing "ph
>         nex2gini" - except RADMODE and COMPRESS are blank, RADFRQ=0,
>         RADDUR=10, RADTIM=071126/1810.. SATFIL=n0r_YYYYMMDD_HHNN. 
>       * datatype.tbl has  NEXRADIII $RAD/NIDS/%SITE%/%PROD% %
>         PROD_YYYYMMDD_HHNN and N0RCOMP $RAD/NEXRADCOMP/1km/n0r
>         n0r_YYYYMMDD_HHNN
> 
> Results: 
>       * nex2gini provides 1 line of feedback after it is run -
>         "[NEX2GINI 4] Write image 071126/1810" 
>       * A file n0r_20071126_1806 is produced in the local directory
>         and is about  14208533 - which seems HUGE! 
>       * Displaying it with gpnexr2 does run - and produces a map with
>         a color bar and title displayed - but no data on the map (I am
>         using "rad" for a proj and "us" for a garea). 
>       * Reducing kyky to 1024;768 produces a file smaller in size -
>         but still comes up blank when displayed with gpnexr2 and nmap2
> 
> 
> So three questions 
>      1. Why is the output file produced blank (per viewing with gpnex2
>         or NMAP2).. perhaps nex2gini is NOT reading data from the
>         NEXRADIII dir prescribed in the datatype.tbl? 
>      2. Does nex2gini actually read files from the NEXRADDIII dir -
>         whether I move the NIDS files to the local dir or the NIDS dir
>         - I get a blank image. 
>      3. I'm assuming nex2gini will read from the NEXRADIII dir and
>         dump do the NORCOMP dir as prescribed in the datatype.tbl -
>         why is the output file written to the local directory instead
>         of the N0RCOMP dir prescribed in the datatype.tbl file?
> 
> Pete 
> 
> 
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