>From: Unidata Support <address@hidden> >Organization: UCAR/Unidata >Keywords: 200307301619.h6UGJWLd013737 ldm-mcidas NIMAGE pngg2gini zlibg2gi Users of the IDD NIMAGE datastream imagery: The NWS is changing the format of the NOAAPORT GINI images: 489 NOXX10 KWBC 291730 DATA MGT MESSAGE 07-03.08 TO AWIPS/NOAAPORT USERS.. FAMILY OF SERVICES/FOS/SUBSCRIBERS... EMERGENCY MANAGERS WEATHER INFORMATION NETWORK /EMWIN/ NATIONAL WEATHER SERVICE /NWS/ CUSTOMERS... WAFS USERS... GTS USERS... NWS FAX CHART USERS FROM RTH WASHINGTON DATA MANAGEMENT SUBJECT GOES COMPRESSION REFERENCES DATA MGT MESSAGE 04-03.01 - NOAAPORT EVOLUTION DATA MGT MESSAGE 07-03.01 - NOAAPORT EVOLUTION UPDATE THE GOES EAST AND WEST DATA FEEDS WILL BE COMPRESSED. DECOMPRESSION MAY BE ACHIEVED USING THE TECHNIQUE SHOWN IN THE TECHNICAL REPORT LISTED IN WHAT S NEW WITH NOAAPORT AT THE FOLLOWING URL ADDRESS HTTP/COLON///WWW.NWS.NOAA.GOV/NOAAPORT/HTML/WHATS NW.SHTML IT IS PLANNED TO COMPRESS THE GOES WEST DATA FEED BETWEEN 1000 AND 1100 EDT ON 7-30-03. IT IS PLANNED TO COMPRESS THE GOES EAST DATA FEED BETWEEN 1000 AND 1100 EDT ON 7-31-03. IF YOU HAVE ANY QUESTIONS REGARDING THIS NOTICE... PLEASE CONTACT PHIL CRAGG E-MAIL PHIL.CRAGG/AT SYMBOL/NOAA.GOV PHONE NUMBER /301/ 713-1570 X134 DATA MANAGEMENT LOWER CASE THIS INFORMATION AS WELL AS THE REFERENCED NOTICES ARE POSTED ON THE NWS DATA MANAGEMENT NOTICES WEB PAGE. THE URL IS LISTED BELOW. HTTP /COLON/ //WWW.NWS.NOAA.GOV/DATAMGMT/INDEX.HTML DATA MANAGEMENT TELECOMMUNICATION OPERATIONS CENTER RTH WASHINGTON SENDS The first of these changes occurred at approximately 16:10Z this morning. The next set of changes, those to GOES-East imagery, will occur at about the same time tomorrow, July 31. A new, "early" release of the ldm-mcidas package of decoders has been made available by anonymous FTP on the Unidata FTP server, ftp.unidata.ucar.edu. This ldm-mcidas release, version ldm-mcidas-2003, contains a new decoder for the Zlib-compressed NOAAPORT NIMAGE images, zlibg2gini. The ldm-mcidas-2003 distribution is available in source and select binary distributions: machine: ftp.unidata.ucar.edu user: anonymous pass: your_full_email_address directory/filename: source: ------- pub/ldm-mcidas/ldm-mcidas-2003.tar.Z binaries: --------- pub/binary/freebsd_4.7-i386/ldm-mcidas-2003.tar.Z pub/binary/hpux_11.00-hp9000/ldm-mcidas-2003.tar.Z pub/binary/irix_6.5-mips/ldm-mcidas-2003.tar.Z pub/binary/linux8_2.4-i686/ldm-mcidas-2003.tar.Z pub/binary/linux_2.4-i686/ldm-mcidas-2003.tar.Z pub/binary/osf1_5.1-alpha/ldm-mcidas-2003.tar.Z pub/binary/sunos_5.6-sparc/ldm-mcidas-2003.tar.Z pub/binary/sunos_5.7-i86pc/ldm-mcidas-2003.tar.Z pub/binary/sunos_5.8-i86pc/ldm-mcidas-2003.tar.Z pub/binary/sunos_5.8-sparc/ldm-mcidas-2003.tar.Z pub/binary/sunos_5.9-sparc/ldm-mcidas-2003.tar.Z Those sites that have been using the ldm-mcidas-2002b PNG decoder, pngg2gini, to decode NOAAPORT GINI imagery will want to download the new ldm-mcidas release and switch to use of zlibg2gini. Invocation syntax of zlibg2gini is identical to pngg2gini. The easiest way for you do upgrade your system is: - logon to your system as the user running your LDM, typically 'ldm' - download the binary distribution that best matches your Operating System NOTE: for most OSes, a binary built on an older OS version will run on newer versions cd ~ldm ftp ftp.unidata.ucar.edu <user> aonymous <pass> your_full_email_address cd pub/binary/<appropriate OS distribution> binary get ldm-mcidas-2003.tar.Z quit - unpack ldm-mcidas-2003.tar.Z in the ~ldm directory: zcat ldm-mcidas-2003.tar.Z | tar xvf - - make sure that the new executables will run on your OS. How this is done is OS dependent. On Sun Solaris, Linux, and FreeBSD, one can use the 'ldd' utility: cd ldm-mcidas-2003/bin ldd pnga2area ldd pngg2gini ldd zlibg2gini etc. - copy the ldm-mcidas decoders that you are currently using from the 2003 distribution to the directory you are using in your 'ldm' account. Here is an example that for sites that put their decoders in ~ldm/decoders: cd ~ldm/ldm-mcidas-2003/bin cp area2png nldn2md pnga2area pngg2gini proftomd zlibg2gini ~ldm/decoders - adjust your pqact.conf entry for NIMAGE decoding. Here is one example: change: # # PNG compressed NOAAPORT GINI images NIMAGE ^sat/ch[0-9]/.*/(.*)/([0-9])([0-9][0-9])([0-9])([0-3][0-9]) ([0-2][0-9])([0-5][0-9])/(.*)/(.*km)/ PIPE -close decoders/pngg2gini -vl logs/ldm-mcidas.log data/pub/raw/gini/\8/\9/\1/\1_\2\3\4\5_\6\7 to: # # PNG compressed NOAAPORT GINI images NIMAGE ^sat/ch[0-9]/.*/(.*)/([0-9])([0-9][0-9])([0-9])([0-3][0-9]) ([0-2][0-9])([0-5][0-9])/(.*)/(.*km)/ PIPE -close decoders/pngg2gini -vl logs/ldm-mcidas.log data/pub/raw/gini/\8/\9/\1/\1_\2\3\4\5_\6\7 # # Zlib compressed NOAAOPRT GOES-East GINI images NIMAGE ^satz/ch[0-9]/.*/(.*)/([0-9])([0-9][0-9])([0-9])([0-3][0-9]) ([0-2][0-9])([0-5][0-9])/(.*)/(.*km)/ PIPE -close decoders/zlibg2gini -vl logs/ldm-mcidas.log data/pub/raw/gini/\8/\9/\1/\1_\2\3\4\5_\6\7 NOTES: 1) the only changes in the zlibg2gini entry are: - sat -> satz - pngg2gini -> zlibg2gini 2) it is likely that the directory structure you are using to save these images is different from the ones listed above. Make changes where appropriate. 3) we do not know if the NWS will be sending any Zlib compressed GOES-East imagery between now and tomorrow when the change is to be made - check the integrity of the pqact.conf changes you make: ldmadmin pqactcheck - if you get no errors from the pqactcheck action above, then send a HUP to pqact telling it to reread your pqact.conf file: ldmadmin pqactHUP ldmadmin tail - make sure that the new decoders are working: cd ~ldm less logs/ldm-mcidas.log <- adjust for whatever log file you are using New Unidata releases of GEMPAK and McIDAS that support direct use of the Zlib-compressed images are being readied for release. After their release and your installation of these packages, you may want to change your pqact.conf action to FILE the image produts. The disk savings you should see by saving the Zlib compressed images will run around 40% over the uncompressed images. An example pqact.conf FILE action based on the actions above would look like: # # Zlib compressed NOAAOPRT GOES-East GINI images NIMAGE ^satz/ch[0-9]/.*/(.*)/([0-9])([0-9][0-9])([0-9])([0-3][0-9]) ([0-2][0-9])([0-5][0-9])/(.*)/(.*km)/ FILE -overwrite -close data/pub/raw/gini/\8/\9/\1/\1_\2\3\4\5_\6\7 Please send all questions/comments to Unidata User Support Tom Yoksas
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