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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
On Fri, 29 Jul 2005, Nelson Brandon K A1C AFWA/SCSA wrote: > I guess I am still misunderstanding sorry and thank you so much for your > patience! > > How are you getting cetegory equals 0 when the place where it is is -1? sorry a typo, catagory does = -1. i was cutting and pasting too quickly. Grib2 products have a category but Grib1 does not so it's set to -1. the aim was trying to make the Grib1 and Grib2 indexes have the same fields/number. didn't work out exactly as planned. > > also this confuses me more... > "-l =23398 //this is probably what confused you, it's the endOfRecord > offset" as i write this, i'm changing the IndexFormat.txt to be correct. the -1 is now endOfRecord. by endOfRecord, that's the offset of the end of record in this file. i made the changes and created a new tar file GribJava.tar.gz. you might want to get it because it has code changes too. robb... > > Thanks again Robb! > > -----Original Message----- > From: Robb Kambic > To: Nelson Brandon K A1C AFWA/SCSA > Cc: decoders; support-thredds > Sent: 7/29/2005 5:35 PM > Subject: RE: Grib File > > On Fri, 29 Jul 2005, Nelson Brandon K A1C AFWA/SCSA wrote: > > > Hey me again! Another question... > > > from the IndexFormat.txt file: > > 3. Grib1 file index > > Section 1 same as Grib2 > > Section 2 Grib Records > one line for each record in the file > blank separated > > ProductType Discipline Category Parameter LevelType1 LevelValue1 255 > LevelValue2 > ReferenceTime ForecastTime Gdskey BmsOrGdsOffset -l DecScale > BmsExists^M > > >0 0 -1 11 107 0 255 0 2005-07-07T00:00:00Z 69 3495848078 82 23398 1 > false > > so: > > ProductType =0 > Discipline =0 > Category =0 > Parameter =11 > LevelType1 =107 > LevelValue1 =0 > 255 // there is not level2Type in Grib1 as in Grib2 > LevelValue2=0 > ReferenceTime =2005-07-07T00:00:00Z > ForecastTime =69 > Gdskey =3495848078 > BmsOrGdsOffset = 82 > -l =23398 //this is probably what confused you, it's the endOfRecord > offset > DecScale =1 > BmsExists =false > > the text explanation of the first eight number fields are in the one of > the following files: > Grib1ProductDefinitionSection.java GribPDSLevel.java > Grib1GridDefinitionSection.java, and the afwa.tab > > robb... > > > > This is a line from the output of the Grib1Indexer class after being > run on > > a grib file. Could you label each of these fields for me? I looked > in the > > file talking about indexes and it didn't make much sense. > > > > You wrote... > > > > you need to look at the index file, file ending with gbx. there a > > explanation of the fields, etc in the IndexFormat.txt file in the root > > dir of the distribution. the important fields are: BmsOrGdsOffset > > DecScale BmsExists. the last 4 fields on the product line ignoring > > the -1 field. > > > > There is no -1 on the end of the file line and if I follow the > directions > > you gave me before I would be ignoring the 23398 number. The get data > line > > I think I should be writing is > > > > java -Xmx256m ucar/grib/grib1/Grib1GetData us057g1010t04a000000000 82 > 1 > > false > > > > I guess I am just kind of confused but it would help me A LOT if you > could > > label each of the fields... Thanks again Robb! > > > > > > > > -----Original Message----- > > From: Robb Kambic [mailto:address@hidden] > > Sent: Wednesday, July 20, 2005 4:29 PM > > To: Nelson Brandon K A1C AFWA/SCSA > > Cc: decoders; support-thredds > > Subject: RE: Grib File > > > > On Wed, 20 Jul 2005, Nelson Brandon K A1C AFWA/SCSA wrote: > > > > > Robb, > > > > > > The problem is I need to write a program that automates it. This > isn't a > > > one time thing with a single grib file. This is something we do > with 100s > > > of grib files every day! Thanks again for your time! > > > > > > Brandon, > > > > the grib.jar api is just a level to decode the grib files, nj22 sits > ontop > > of it to do the work for specifc parameters based on their parameter > > name/number, level type, and level. the nj22 code is available at: > > > > http://my.unidata.ucar.edu/content/software/netcdf-java/index.html > > > > the files used to handle the grib files is located at: > > src/ucar/nc2/iosp/grib in the distribution. i would download the src > for > > 2.2.10 and build it. run the toolUI program settng breakpoints in the > src > > to find the routines to perform the functions you are investigating. > > > > robb... > > > > > > > > > > --Brandon > > > > > > -----Original Message----- > > > From: Robb Kambic [mailto:address@hidden] > > > Sent: Wednesday, July 20, 2005 12:27 PM > > > To: Nelson Brandon K A1C AFWA/SCSA > > > Cc: support-thredds; decoders > > > Subject: RE: Grib File > > > > > > On Wed, 20 Jul 2005, Nelson Brandon K A1C AFWA/SCSA wrote: > > > > > > > Thanks again for your work Robb! Basicly what I am trying to do > is pull > > > out > > > > specifc parameters based on their parameter name/number, level > type, and > > > > level. > > > > > > Brandon, > > > > > > have you looked at that web start program? it does all the tasks > that you > > > mention and it will write out a file with only the desired > paramters. i > > > will see if there is some more doc on how to use it. it's based on > the > > > java grib.jar that you been working with. > > > > > > robb... > > > > > > > > > > > > > > > Could you point me in the right direction in your code on how I > > > > might do this? Things like Grib1LookUp look promising but there > isn't > > > > enough documentation (which is ok I know it's a beta ;)) for me to > > > > understand it as I am relatively new to grib files. Thanks for > any > > > further > > > > help! > > > > > > > > V/r > > > > Brandon > > > > > > > > -----Original Message----- > > > > From: Robb Kambic [mailto:address@hidden] > > > > Sent: Tuesday, July 19, 2005 3:20 PM > > > > To: Nelson Brandon K A1C AFWA/SCSA > > > > Cc: support-thredds; decoders > > > > Subject: RE: Grib File > > > > > > > > > > > > well, it looks like we did double the work. i also created a > afwa.tab > > and > > > > added it tothe distribution. the new distribution is in the ftp > > decoders > > > > directory. let me know if you run into any problems. > > > > > > > > robb... > > > > > > > > > > > > > > > > On Tue, 19 Jul 2005, Nelson Brandon K A1C AFWA/SCSA wrote: > > > > > > > > > I have updated your grib table with all of the ones you stated > were > > > > missing. > > > > > Let me know when you put this into the build so I can check it > out and > > > see > > > > > if there are anymore unknown parametes. Also it is not Air > Force > > Global > > > > > Weather Center anymore. We are called Air Force Weather Agency! > > > > > > > > > > Thanks a bunch again Robb! Really been a help and I appreciate > your > > > time! > > > > > > > > > > --Brandon > > > > > > > > > > -----Original Message----- > > > > > From: Robb Kambic [mailto:address@hidden] > > > > > Sent: Monday, July 18, 2005 12:10 PM > > > > > To: Nelson Brandon K A1C AFWA/SCSA > > > > > Cc: support-thredds; decoders > > > > > Subject: RE: Grib File > > > > > > > > > > > > > > > Brandon, > > > > > > > > > > after viewing the data, i discovered many missing parameters. i > > couldn't > > > > > find these on the web, do you know a location for a table? or > do you > > > know > > > > > the name, short desc, long desc, and units for the following > parameter > > > > > numbers. > > > > > > > > > > 134-137, 140-143, 145-149, 151, 152 155 157, 161, 163, 165-171, > > 191-194, > > > > > 197, 199, 208, 209, 220-223, 227, 228, 230-239, 241, 246, > 248-254 > > > > > > > > > > robb... > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > On Mon, 18 Jul 2005, Robb Kambic wrote: > > > > > > > > > > > On Mon, 18 Jul 2005, Nelson Brandon K A1C AFWA/SCSA wrote: > > > > > > > > > > > > > It works! Thanks so much for your time Robb! I am going to > poke > > > > around > > > > > in > > > > > > > the Java files but could you get me a pointer (excuse the > > > programming > > > > > pun) > > > > > > > in the right direction as how to pull out specific > parameters from > > a > > > > > grib > > > > > > > file? Thanks again! > > > > > > > > > > > > > > > > > > Brandon, > > > > > > > > > > > > you need to look at the index file, file ending with gbx. > there a > > > > > > explanation of the fields, etc in the IndexFormat.txt file in > the > > root > > > > dir > > > > > > of the distribution. the important fields are: > BmsOrGdsOffset > > > > > > DecScale BmsExists. the last 4 fields on the product line > ignoring > > > the > > > > -1 > > > > > > field. for instance product line: > > > > > > > > > > > > 1 0 -1 11 107 0 255 0 2005-07-07T00:00:00Z 0 3495848078 46890 > 70206 > > 1 > > > > > > false > > > > > > > > > > > > then the Grib1GetData will grab the data: > > > > > > java -Xmx256m ucar/grib/grib1/Grib1GetData > > > data/us057g1010t04a000000000 > > > > > > 46890 1 false > > > > > > > > > > > > will return the temperature data in K. the product name is > from > > the > > > 11 > > > > > > the 4th field from the table gwc_2.tab. > > > > > > > > > > > > that's the hard way to extract the data. > > > > > > > > > > > > we have a webstart program called netcdf tools at: > > > > > > > > > > > > > > > > > > > > > http://my.unidata.ucar.edu/content/software/netcdf-java/v2.2/webstart/in > dex. > > > > > html > > > > > > > > > > > > a quick way to view the data would be to click the viewer tab > and > > then > > > > > > open the folder tab ( on the right side ) to select the data > set to > > > > open. > > > > > > this tools works with netcdf, grib, and other types of data. > there's > > > > even > > > > > > grid viewer if you select the grids tab, then open the > dataset. > > > there's > > > > a > > > > > > red icon on the right to select. the tools program is a test > program > > > we > > > > > > use, it's not really a product. > > > > > > > > > > > > robb... > > > > > > > > > > > > > > > > > > > > -----Original Message----- > > > > > > > From: Robb Kambic [mailto:address@hidden] > > > > > > > Sent: Friday, July 15, 2005 4:45 PM > > > > > > > To: Nelson Brandon K A1C AFWA/SCSA > > > > > > > Cc: decoders; support-thredds > > > > > > > Subject: RE: Grib File > > > > > > > > > > > > > > Brandon, > > > > > > > > > > > > > > are you sure you got the latest GribJava.tar.gz? the latest > is: > > > > > > > 711461 Jul 11 14:12 GribJava.tar.gz > > > > > > > > > > > > > > i ran the following w/o any exceptions thrown. > > > > > > > > > > > > > > % java -Xmx256m ucar/grib/GribChecker > data/us057g1010t04a000000000 > > > > > > > % java -Xmx256m ucar/grib/grib1/Grib1Dump > > > data/us057g1010t04a000000000 > > > > | > > > > > > > more > > > > > > > % java -Xmx256m ucar/grib/grib1/Grib1Indexer > > > > > data/us057g1010t04a000000000 > > > > > > > | more > > > > > > > > > > > > > > remember the CLASSPATH must be set to find the grib.jar, > > > jpeg2000.jar, > > > > > and > > > > > > > junit.jar. if you still get exception let me know. > > > > > > > > > > > > > > robb... > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ======================================================================== > ==== > > > > > > > === > > > > > > > Robb Kambic Unidata Program > Center > > > > > > > Software Engineer III Univ. Corp > for > > > > > Atmospheric > > > > > > > Research > > > > > > > address@hidden WWW: > > > http://www.unidata.ucar.edu/ > > > > > > > > > > > > > > > > > > > > > > ======================================================================== > ==== > > > > > > > === > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ======================================================================== > ==== > > > > > === > > > > > > Robb Kambic Unidata Program > Center > > > > > > Software Engineer III Univ. Corp for > > > > Atmospheric > > > > > Research > > > > > > address@hidden WWW: > > http://www.unidata.ucar.edu/ > > > > > > > > > > > > > > > > > > > > > ======================================================================== > ==== > > > > > === > > > > > > > > > > > > > > > > > > > > > > > > > > ======================================================================== > ==== > > > > > === > > > > > Robb Kambic Unidata Program > Center > > > > > Software Engineer III Univ. Corp for > > > Atmospheric > > > > > Research > > > > > address@hidden WWW: > http://www.unidata.ucar.edu/ > > > > > > > > > > > > > > > ======================================================================== > ==== > > > > > === > > > > > > > > > > > > > > > > > > > > > > > > ======================================================================== > ==== > > > > === > > > > Robb Kambic Unidata Program > Center > > > > Software Engineer III Univ. Corp for > > Atmospheric > > > > Research > > > > address@hidden WWW: > http://www.unidata.ucar.edu/ > > > > > > > > > > ======================================================================== > ==== > > > > === > > > > > > > > > > > > > ======================================================================== > ==== > > > === > > > Robb Kambic Unidata Program Center > > > Software Engineer III Univ. Corp for > Atmospheric > > > Research > > > address@hidden WWW: > http://www.unidata.ucar.edu/ > > > > > > ======================================================================== > ==== > > > === > > > > > > > > ======================================================================== > ==== > > === > > Robb Kambic Unidata Program Center > > Software Engineer III Univ. Corp for Atmospheric > > Research > > address@hidden WWW: > http://www.unidata.ucar.edu/ > > > ======================================================================== > ==== > > === > > > > ======================================================================== > ======= > Robb Kambic Unidata Program Center > Software Engineer III Univ. Corp for Atmospheric > Research > address@hidden WWW: > http://www.unidata.ucar.edu/ > ======================================================================== > ======= > =============================================================================== Robb Kambic Unidata Program Center Software Engineer III Univ. Corp for Atmospheric Research address@hidden WWW: http://www.unidata.ucar.edu/ ===============================================================================