creating a descriptor file for an hdf file
Don Hooper
hoop at COLORADO.EDU
Thu Mar 22 14:07:54 EDT 2007
I'm not sure I know how to read NCL's dumps, but it looks like the
lat and lon coordinate variables misnamed their units attribute as
just "unit", which would lead to the sdfopen error message. So,
I'm guessing the XDFopen DDF only needs these three lines:
DSET /path/to/foo.hdf
XDEF lon
YDEF lat
The rest will (hopefully) be picked up automagically. I suspect the
reason why ncdump didn't work is that it was they Unidata NetCDF
version of ncdump, not the one that comes with HDF-SDS. Try the above
to start, and then maybe enhance it if need be.
-Hoop
> From owner-gradsusr at LIST.CINECA.IT Thu Mar 22 11:24:43 2007
>
> Hello all,
> I a am trying to create a descriptor file for an hdf data file for
> Pathfinder SST data set available from
> http://podaac.jpl.nasa.gov/products/product216.html.
>
> - sdfopen creates an error message about not recognizing the x-coordinate.
> i tried xdfopen with a file but since the data is at 4km res, not sure how
> to specify it in a descriptor file. any help is highly appreciated.
>
> -------------------------------------------------------------------------
>
> I am currently using:
>
> Grid Analysis and Display System (GrADS) Version 1.9b4
> ....
> Config: v1.9b4 32-bit little-endian readline sdf/xdf hdf-sds netcdf lats
> printim
>
> on a Linux box.
>
> --------------------------------------------------------------------------
>
> The ncl_file dump looks like this (could not get ncdump to work):
>
> >ncl_filedump 200201.s04w3pfrt-sst-16b.hdf
> Copyright (C) 1995-2006 - All Rights Reserved
> University Corporation for Atmospheric Research
> NCAR Command Language Version 4.2.0.a034
> The use of this software is governed by a License Agreement.
> See http://www.ncl.ucar.edu/ for more details.
> Variable: f (file variable)
>
> filename: 200201.s04w3pfrt-sst-16b
> path: 200201.s04w3pfrt-sst-16b.hdf
> file global attributes:
> dsp_SubImageId : 0
> dsp_SubImageName : SST
> dsp_ModificationDate : 20040222
> dsp_ModificationTime : 154417
> dsp_SubImageFlag : 64
> dsp_SubImageTitle : \\NLC Postage Stamp
> dsp_StartDate : 20020106
> dsp_StartTime : 45722.11
> dsp_SizeX : 8192
> dsp_SizeY : 4096
> dsp_OffsetX : 0
> dsp_RecordLength : 16384
> dsp_DataOrganization : 0x40
> dsp_NumberOfBands : 0x01
> dsp_ing_tiros_ourid : NO16GAC C���
> dsp_ing_tiros_numscn : -4857
> dsp_ing_tiros_idsat : 3072
> dsp_ing_tiros_iddata : 512
> dsp_ing_tiros_year : -11769
> dsp_ing_tiros_daysmp : 1536
> dsp_ing_tiros_milsec : -1019277311
> dsp_ing_tiros_slope : <ARRAY>
> dsp_ing_tiros_intcpt : <ARRAY>
> dsp_ing_tiros_tabadr : <ARRAY>
> dsp_ing_tiros_cnlins : 256
> dsp_ing_tiros_cncols : 256
> dsp_ing_tiros_czncs : -26367
> dsp_ing_tiros_line : 256
> dsp_ing_tiros_icol : 0
> dsp_ing_tiros_date0 : 18-FEB-04 22:52:39�
> dsp_ing_tiros_time0 : 22:52:39�
> dsp_ing_tiros_label : <ARRAY>
> dsp_ing_tiros_nxtblk : 1280 dsp_ing_tiros_nxtblk : 1280
> dsp_ing_tiros_datblk : 1280
> dsp_ing_tiros_itape : 256
> dsp_ing_tiros_cbias : 0
> dsp_ing_tiros_ccoeff : 0
> dsp_ing_tiros_pastim : -1019277311
> dsp_ing_tiros_passcn : 256
> dsp_ing_tiros_lostct : 0
> dsp_ing_tiros_lost : <ARRAY>
> dsp_ing_tiros_ndrll : 2560
> dsp_ing_tiros_ndrrec : <ARRAY>
> dsp_ing_tiros_ndrlat : <ARRAY>
> dsp_ing_tiros_ndrlon : <ARRAY>
> dsp_ing_tiros_chncnt : 1280
> dsp_ing_tiros_chndsq : <ARRAY>
> dsp_ing_tiros_czncs2 : -13056
> dsp_ing_tiros_wrdsiz : 512
> dsp_ing_tiros_nchbas : 0
> dsp_ing_tiros_nchlst : 0
> dsp_ing_tiros_rpmclc : 0
> dsp_ing_tiros_numpix : -26367
> dsp_ing_tiros_scnden : 768
> dsp_ing_tiros_eltden : 1280
> dsp_ing_tiros_orbtno : 0
> dsp_ing_tiros_slope2 : <ARRAY>
> dsp_ing_tiros_intcp2 : <ARRAY>
> dsp_ing_tiros_prtemp : -7.290557e-08
> dsp_ing_tiros_timerr : 0
> dsp_ing_tiros_timstn : 0
> dsp_nav_xsatid : BIN
> dsp_nav_xsatty : 0x05
> dsp_nav_xproty : 0x08
> dsp_nav_xmapsl : 0x00
> dsp_nav_xtmpch : 0x04
> dsp_nav_ximgdy : 2006
> dsp_nav_ximgtm : 45722.11
> dsp_nav_xorbit : 6653
> dsp_nav_ximgcv : <ARRAY>
> dsp_nav_earth_linoff : 0
> dsp_nav_earth_pixoff : 0
> dsp_nav_earth_scnstr : 1
> dsp_nav_earth_scnstp : 4096
> dsp_nav_earth_pixstr : 1
> dsp_nav_earth_pixstp : 8192
> dsp_nav_earth_latorg : 0
> dsp_nav_earth_lonorg : 0
> dsp_nav_earth_orgrot : 0
> dsp_nav_earth_lattop : 0
> dsp_nav_earth_latbot : 0
> dsp_nav_earth_latcen : 0
> dsp_nav_earth_loncen : 0
> dsp_nav_earth_height : 179.96
> dsp_nav_earth_width : 0
> dsp_nav_earth_level : 1
> dsp_nav_earth_xspace : 3
> dsp_nav_earth_yspace : 3
> dsp_nav_earth_rev : 1.0
> dsp_nav_earth_dflag : 0
> dsp_nav_earth_numpix : 8192
> dsp_nav_earth_numras : 4096
> dsp_nav_earth_magxx : 1
> dsp_nav_earth_magyy : 1
> dsp_hgt_llnval : 23
> dsp_hgt_lltime : 17792115
> dsp_hgt_llvect : <ARRAY>
> history : PATHNLC Feb 18 22:54:54 2004 PATHNLC
> t,3,270.16,0.05,0.,0.01,271.16,308.16,,,,1,,,2,,,3,,,,,,4,,,,,,,1.,,35.,0.1,5,,,,,,,0.7,,35.,0.15,45.,80.,0.005,20,0.,3.6,0.,8.,t,,,,,,,,
> ,,,,1.2,,,,1.2,,55.,1,270.16,0.05 pixsiz=16 allb=4 nlsst=1 vernum=4
> version=V4.2 pathfinder flagtree 3bitqual 14oct97 newtest=1 tree=0
> in=/var1/gacsst/orbit/02006032613/sector//02006045722.N16 at ingest
> in1=/var1/gacsst/gacmask//3wk-200202.m1dw0oisstv2-sst
> out=/var1/gacsst/gacsst//02006045722.sst at ingest
> PATHNLC NLSST Temp calculation date: April 10, 1996
> oisstv2mia Jul 10 15:27:43 2002 oisstv2mia IN=../global_blnk.m1d-sst
> IN1=oisst.20020109 OUT=200202.m1dw0oisstv2-sst dtype=1 bias=-3 slope=0.15
> STATS Jul 10 18:31:56 2002 STATS minpix=1 maxpix=255
> in=/usr5/gacsst/etc/oiv2/02//200202.m1dw0oisstv2-sst a udit=t,
> callim=f, cal=f, cloud=f
> outm=/usr5/gacsst/etc/oiv2/02/3wk-200202.m1dw0oisstv2-sst
> oisstv2mia Jul 10 15:27:38 2002 oisstv2mia IN=../global_blnk.m1d-sst
> IN1=oisst.20020102 OUT=200201.m1dw0oisstv2-sst dtype=1 bias=-3 slope=0.15
> STATS /usr5/gacsst/etc/oiv2/02//200201.m1dw0oisstv2-sst
> oisstv2mia Jul 10 15:27:43 2002 oisstv2mia IN=../global_blnk.m1d-sst
> IN1=oisst.20020109 OUT=200202.m1dw0oisstv2-sst dtype=1 bias=-3 slope=0.15
> STATS /usr5/gacsst/etc/oiv2/02//200202.m1dw0oisstv2-sst
> oisstv2mia Jul 10 15:27:48 2002 oisstv2mia IN=../global_blnk.m1d-sst
> IN1=oisst.20020116 OUT=200203.m1dw0oisstv2-sst dtype=1 bias=-3 slope=0.15
> STATS /usr5/gacsst/etc/oiv2/02//200203.m1dw0oisstv2-sst
> PATHNLC /var1/gacsst/gacmask//3wk-200202.m1dw0oisstv2-sst
> PATHNLC 45d coeffs used (1) = 1.037 0.917 0.106 1.008 0.000
> PATHNLC 45d coeffs used (2) = 1.488 0.927 0.074 0.842 0.000
> PATHNLC 45d coeffs used (3) = 0.000 0.000 0.000 0.000 0.000
> PATHNLC GETOZONE I 0.0900 0.0000
> PATHBIN Feb 18 22:57:06 2004 PATHBIN RESOLVE=4 BINMODEL=1 ASC=A
> GRID=(16, 16) IN=/var1/gacsst/gacsst//02006045722.sst at ingest@sst NLC=1
> DATADAY=2002006 DAYSTR=02006013302 DAYEND=02007012446
> OUT=/var1/gacsst/gacpst//02006045722.b04p3pfrt at pst\NLC Postage Stamp
> ALLB=4 SEAMLON=-180.0 LAND=/var1/gacsst/gacmask//pfv50-land.b04bit-180
> PATHTIME Feb 18 22:57:45 2004 PATHTIME WQ=B ASC=A
> IN=/tmp/02006032613-2002005-3.filespfrt
> OUT=/var1/gacsst/gaclpst//02006032613-2002005.b04o3pfrt at pst@bin_number
> PATHTIME /var1/gacsst/gacpst//02006042336-2002005.b04p3pfrt at pst@bin_number
> PATHTIME /var1/gacsst/gacpst//02006045722-2002005.b04p3pfrt at pst@bin_number
> PATHTIME Feb 18 23:07:07 2004 PATHTIME WQ=B ASC=A
> IN=/i1/gacsst/gacopst/2002005.fileapfrt
> OUT=/r1/gacsst/pfrt/b04d/02/01/2002005.b04d3pfrt-p at pst@bin_number
> satzen=f
> PATHTIME /i1/gacsst/gacopst//02004222253-2002005.b04o3pfrt at pst@bin_number
> PATHTIME /i1/gacsst/gacopst//02004235921-2002005.b04o3pfrt at pst@bin_number
> PATHTIME /i1/gacsst/gacopst//02005014759-2002005.b04o3pfrt at pst@bin_number
> PATHTIME /i1/gacsst/gacopst//02005033918-2002005.b04o3pfrt at pst@bin_number
> PATHTIME /i1/gacsst/gacopst//02005052632-2002005.b04o3pfrt at pst@bin_number
> PATHTIME /i1/gacsst/gacopst//02005070823-2002005.b04o3pfrt at pst@bin_number
> PATHTIME /i1/gacsst/gacopst//02005085135-2002005.b04o3pfrt at pst@bin_number
> PATHTIME /i1/gacsst/gacopst//02005102604-2002005.b04o3pfrt at pst@bin_number
> PATHTIME /i1/gacsst/gacopst//02005120825-2002005.b04o3pfrt at pst@bin_number
> PATHTIME /i1/gacsst/gacopst//02005134836-2002005.b04o3pfrt at pst@bin_number
> PATHTIME /i1/gacsst/gacopst//02005152834-2002005.b04o3pfrt at pst@bin_number
> PATHTIME /i1/gacsst/gacopst//02005165438-2002005.b04o3pfrt at pst@bin_number
> PATHTIME /i1/gacsst/gacopst//02005183336-2002005.b04o3pfrt at pst@bin_number
> PATHTIME /i1/gacsst/gacopst//02005202324-2002005.b04o3pfrt at pst@bin_number
> PATHTIME /i1/gacsst/gacopst//02005220553-2002005.b04o3pfrt at pst@bin_number
> PATHTIME /i1/gacsst/gacopst//02005234743-2002005.b04o3pfrt at pst@bin_number
> PATHTIME /i1/gacsst/gacopst//02006013906-2002005.b04o3pfrt at pst@bin_number
> PATHTIME /i1/gacsst/gacopst//02006032613-2002005.b04o3pfrt at pst@bin_number
> PATHCLMAP Feb 19 15:22:52 2004 PATHCLMAP thresh=2. thr2 =12. WQ=F
> in=/r1/gacsst/pfrt/b04d/02/01//2002005.b04d3pfrt-p at pst
> ref=/r1/gacsst/pfrt/ref/02//3wk-200201.b09w3pfrt-f7-7 at pst
> map=/r1/gacsst/gacmask//bin2bin.u04to09
> PATHTIME Feb 19 16:01:52 2004 PATHTIME WQ=B ASC=A
> IN=/r1/gacsst/pfrt/topt/200201.file3pfrt
> OUT=/r1/gacsst/pfrt/b04w/02/200201.b04w3pfrt at pst@sst at pst@bin_number
> satzen=f
> PATHTIME /r1/gacsst/pfrt/topt//2001364.b04d3pfrt at pst@bin_number
> PATHTIME /r1/gacsst/pfrt/topt//2001365.b04d3pfrt at pst@bin_number
> PATHTIME /r1/gacsst/pfrt/topt//2002001.b04d3pfrt at pst@bin_number
> PATHTIME /r1/gacsst/pfrt/topt//2002002.b04d3pfrt at pst@bin_number
> PATHTIME /r1/gacsst/pfrt/topt//2002003.b04d3pfrt at pst@bin_number
> PATHTIME /r1/gacsst/pfrt/topt//2002004.b04d3pfrt at pst@bin_number
> PATHTIME /r1/gacsst/pfrt/topt//2002005.b04d3pfrt at pst@bin_number
> PATHMAP Feb 22 15:44:17 2004 PATHMAP STAT=M QUAL=A WQ=D PIXSIZ=16
> IN=/h/mo1/gacsst/pfrt/tomp//200201.b04w3pfrt at pst@sst
> OUT=(IMG=/mo1/gacsst/pfrt/m04w/02/200201.s04w3pfrt-sst-16b at sst SLO= 0.075
> INT= -3.0 )
> PATHMAP Output image pixel, line size = 8192, 4096
> PATHMAP Grid spacing (X,Y) = ( 3.00, 3.00), Projection
> Code= 7
> PATHMAP Projection Origin Lon,Lat,Rotation = 0.00 0.00
> 0.00
> PATHMAP center lon,lat,width, or height = 0.00 0.00
> 0.00 179.96
>
> q=d
> dimensions:
> lat = 4096
> lon = 8192
> variables:
> short sst ( lat, lon )
> dsp_PixelType : 0x01
> dsp_PixelSize : 0x02
> dsp_Flag : 0
> dsp_nBits : 16
> dsp_LineSize : 0
> dsp_cal_name : Temperature
> units : Temp
> dsp_cal_eqnNumber : 2
> dsp_cal_CoeffsLength : 8
> dsp_cal_coeffs : <ARRAY>
> scale_factor : 0.075
> add_off : -3
> hdf_name : sst
>
> double lat ( lat )
> unit : degrees_north
> long_name : latitude
> hdf_name : lat
>
> double lon ( lon )
> unit : degrees_east
> long_name : longitude
> hdf_name : lon
>
>
> Thank you!
> Deborah Herceg
>
More information about the gradsusr
mailing list