Hi Rodrigo,
Please let us know if Steve Chiswell's reply to the note you sent
to the ldm-users email list answered your questions.
One thing that Steve did not tell you is that the ldm-mcidas 'area2png'
routine is used to compress images in McIDAS AREA format using a PNG
compression of the image portion of the data (not the header). We
use this routine to compress the images sent in the Unidata-Wisconsin
datastream (IDD feedtype UNIWISC (aka MCIDAS)) for transmission.
Up until fairly recently, Unidata McIDAS users needed to uncompress
these images using the ldm-mcidas utility 'pnga2area'. With the
latest Unidata McIDAS addendum (v2006f), however, McIDAS users
can now read the PNG-compressed images directly (like GEMPAK has
been able to do for quite some time).
Again, please let us know if you have additional questions.
> I'm trying to install thredds to serve some LDM information
> from our ldm site (depresion.dgf.uchile.cl / version:6.4.6).
> I am not a Thredds expert, but seems to need "gini" format
> to serve satellite images. My ldmd.conf file said:
> ..
> exec "pqact -f MCIDAS|NIMAGE etc/pqact.gempak_images"
> ..
>
> my pqact.gempak_images file said (for example):
>
> MCIDAS ^pnga2area Q. (UY) (.*) (.*)_IMG (.*) (.*) (........) (....)
> PIPE -close
> pnga2area -vl /home/ldm/logs/ldm-mcidas.log
> -a etc/SATANNOT
> -b etc/SATBAND
> data/gempak/images/sat/MOLLWEIDE/24km/WV/WV_\6_\7
>
>
> =====================================
>
>
> I have tried to convert to "gini" with
> ldm-mcidas-2004/bin/area2png
>
> #area2png -a /home/ldm/etc/SATANNOT -b /home/ldm/etc/SATBAND -lx - -f
> test_IR_20070402_1545 test_IR_20070402_1545.png
> # more LOG
> Apr 05 18:48:34 area2png[22468]: Starting Up
> input AREA size: 4724328
> in GetFileName
> mask: 8
> band: 4
> in GetSatAnnotInfo
> in GetSatBandInfo
> css: 78
> cal: GVAR
> cres: 4km
> in ReplaceToken
> in ReplaceToken
> in ReplaceToken
> Apr 05 18:48:34 area2png[22468]: output file pathname:
> test_IR_20070402_1545.png
> memory mapped input file test_IR_20070402_1545
> image shape: 2726 x 1732
> image line length: 1732
> number of bytes to beginning of data: 2816
> number of bytes in comment cards: 80
> number of bytes to beginning of comment cards: 4724248
> deflated length 1908857
> Apr 05 18:48:36 area2png[22468]: doPNG:: 4724328 1908857 0.40
>
>
>
> and then :
> ldm-mcidas-2004/bin/pngg2gini..
>
> #pngg2gini -vxl LOGINI -f test_IR_20070402_1545.png paso/image.gini
> #more LOGINI
> Apr 05 18:51:22 pngg2gini[22574]: Starting Up
> Apr 05 18:51:22 pngg2gini[22574]: WMO Header not supported by pngg2gini:
>
>
> Does exist a better way to have a format ("gini" ??) that can be serve
> by thredds ?? may be an option in pqact.gempak_images ??
>
>
>
> Thanks in advance
> Rodrigo Sanchez
> DGF, U. de Chile
>
>
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>
>
Cheers,
Tom
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Ticket Details
===================
Ticket ID: OPC-671989
Department: Support ldm-mcidas
Priority: Normal
Status: Closed
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