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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:rkambic@xxxxxxxxxxxxxxxxxxxxxxxx] > > 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:rkambic@xxxxxxxxxxxxxxxxxxxxxxxx] > > > 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:rkambic@xxxxxxxxxxxxxxxx] > > > > 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:rkambic@xxxxxxxxxxxxxxxxxxxxxxxx] > > > > > 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:rkambic@xxxxxxxxxxxxxxxx] > > > > > > > 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 rkambic@xxxxxxxxxxxxxxxx WWW: http://www.unidata.ucar.edu/ ==============================================================================
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