NOAA / NWS's Meteorological Development Laboratory
Degrib (NDFD GRIB2 Decoder) 
|
NOAA / NWS's Meteorological Development Laboratory
| |
|
|
Degrib (NDFD GRIB2 Decoder) |
 |
NDFD Home | Verification | News | Organization |  |
|
Subject: Degrib 1.25
Date: Fri, 08 Aug 2003 14:22:04 -0400 From: "Arthur.Taylor" Organization: DOC/NOAA/NWS - National Weather Service To: Arthur.Taylor@noaa.gov Hi You all have the unique distinction of being registered on my degrib (aka NDFD_GRIB2Decoder) mailing list (all 129 of us) (I'd like to welcome: mhearse, Gary Watry, vikashsrivastava, maciver, Chris Maltese, josephs, n.n, jlogan, Marc Saccucci, and Geoffrey Rowland) (special welcome to Marc who finally registered :-). He's been doing the web development on "http://www.nws.noaa.gov/forecasts/graphical/" for NDFD) Please let me know (email me) if you want to unregister. The latest version of the program is on: www.nws.noaa.gov/mdl/NDFD_GRIB2Decoder/ ----------- News about this release: I just wanted to let you all know that I have just finished putting together version "1.25" (last one that I announced was "1.23" on 7/31/2003). (I skipped "1.24" since this release is more than just bug fixes.) This release is mainly focused on making the -P option a little more flexible, figuring out about ESRI ArcGIS projections, and tying up some loose ends before burning some CDs for the NDFD Tech Conference.. ----- -P option fixes: 1) Added a -pntStyle option, at the request of Jim Scott and Matt Kallio. They both independently preferred that the -P output be "Stn Name(or lat,lon), Elem[Unit], refTime, valTime, value", instead of the "Elem, Unit, refTime, valTime, (Value at Lat/lon 1), ..." that I had been using. The new format is similar to an XYZ file, and may be easier to parse into databases. The original style is the default. 2) Added a -WxParse option for Probe point (so it can give either "ugly weather strings", "english translations of the ugly string", or "the NDFD Simple Weather code". "ugly weather strings" is the default. 3) Added a -Separator option for Probe point (so you can use " | " instead of the default of ", ". 4) Found the logic error that was causing my "pntFile trap". One can now have either: "station ID, lat, lon" or "lat, lon". Before people would try "lat, lon" and nothing would happen. :-( ----- ESRI Map Projection: 5) Found out about Map Projections in ESRI's new ArcGIS. I had been using ESRI ArcView 3.1, but now have access to an ESRI ArcGIS 8. ArcGIS users should check out "./degrib/arcview/prj.adf" and "./degrib/arcview/ndfd.prj". The "ndfd.prj" will set up the NDFD projection for an arbitrary Layer. The "prj.adf" allows you to set the NDFD projection for a "grid" data set. So when dealing with "grids", the process should be: A) Take the .flt file and use ArcGIS 8.3 or ArcInfo and convert to a grid using the "toolbox". B) copy the "prj.adf" into the newly created "grid" directory. C) Bring in the "grid" into ArcGIS. (Alternatively you can enter the correct projection information into a "toolbox" program and it should generate the same "prj.adf"). Note: ArcGIS 8.1 and 8.2 did not have the .flt to "grid" tool, :-( .. So I may have to create "ESRI ASCII grids" for those users. If you have more questions, please email me. ----- Miscellaneous: 6) Improved the handling of command line options to "degrib". In particular it now properly handles the case where you give it the name of a file for input, and the file doesn't exist. Also it now handles the case where an option implies there is a second argument, but there are no more arguments on the command line. 7) Adjusted the inventory command to use GRIB_LIMIT when looking for just the first message. After finding the first message, it now allows there to be an arbitrary number of bytes before the next message. This is useful when dealing with files where the GRIB encoder software (typically GRIB1) has bugs. So it shouldn't affect NDFD, since they got rid of those bugs already. 8) Updated the cities file (sample points for superImageGen), and updated the qpf and sky colortables (again for superImageGen) 9) Memory leak detected and fixed in the GRIB1 code (doesn't affect NDFD stuff). 10) Fixed the spelling of the "Hazzard" category (to "Hazard") when creating weather .shp files. ----------- As always, I tested this release on my PC (win 2000), a Linux machine, a HP-Unix machine, and an AIX-Unix (machine). Although I may have missed something in my testing, it should at least compile, and run for some of the test cases. For those of you with access to the NWS NCEP machine, my current version is in: /nfsuser/g06/we25at/degrib (on snow/frost). For those with access to MDL's GDP or NHDW machines, see: /home/taylor/ (./degrib/bin/degrib.linux for linux or ./degrib/bin/degrib.hp for Hp's) Please let me know if you have problems. Regards, Arthur
|
||||||||||||||||||||||||||||||||||||||||||||||||||||
