[gdal-dev] subdatasets not read in a HDF file

Sun Oct 23 14:54:50 EDT 2011

Etienne,

1) Manage to attach the file (zipped) to the just opened ticket.

2) Unfortunately it doesn't work. It says the usual

C:\SVN\mironeWC>gdalinfo "NETCDF:S1998031140424.L2_MLAC_OC.x.hdf:longitude"
ERROR 4: `NETCDF:S1998031140424.L2_MLAC_OC.x.hdf:longitude' does not 
exist in the file system,

Note that I built GDAL with netcdf4 that on Windows is always linked 
against HDF.

Joaquim

> 1) Not sure, but give it a try! If not, put it somewhere accessible on 
> the web.  You should definitively create a ticket for this.
>
> 2)
> netcdf supports HDF4 if it was configured for hdf4 support.
>
> In that case, to force the netcdf driver you would have to 
> use "NETCDF:filename:subdataset", or else the HDF4 driver will open it 
> pick it up.
>
> Etienne
>
> On Sat, Oct 22, 2011 at 9:57 AM, Joaquim Luis <jluis at ualg.pt 
> <mailto:jluis at ualg.pt>> wrote:
>
>     Hi,
>
>     I'm having troubles reading a SeaWifs L2 hdf file due to a bug in
>     the hdf driver. The problem here is that not all Subdatasets are
>     read.
>     Below is the list givem by gdalinfo, which lacks 2 subdatasets: the
>     cntl_pt_cols & cntl_pt_rows
>     To prove I attach a little screencapture of "HDF Explorer".
>
>     Now I have two questions.
>
>     1- The hdf file in question is relatively small (1.2 Mb). Can I
>     attach it to a ticket?
>
>     2- If I build GDAL with netCDF4, can I force the reading of this
>     file with the netCDF driver? And if yes, how?
>
>     Thanks
>
>     Joaquim
>
>
>
>
>     Subdatasets:
>      
>     SUBDATASET_1_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":11
>       SUBDATASET_1_DESC=[391x78] longitude (32-bit floating-point)
>      
>     SUBDATASET_2_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":12
>       SUBDATASET_2_DESC=[391x78] latitude (32-bit floating-point)
>      
>     SUBDATASET_3_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":13
>       SUBDATASET_3_DESC=[391x78] Rrs_412 (16-bit integer)
>      
>     SUBDATASET_4_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":14
>       SUBDATASET_4_DESC=[391x78] Rrs_443 (16-bit integer)
>      
>     SUBDATASET_5_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":15
>       SUBDATASET_5_DESC=[391x78] Rrs_490 (16-bit integer)
>      
>     SUBDATASET_6_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":16
>       SUBDATASET_6_DESC=[391x78] Rrs_510 (16-bit integer)
>      
>     SUBDATASET_7_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":17
>       SUBDATASET_7_DESC=[391x78] Rrs_555 (16-bit integer)
>      
>     SUBDATASET_8_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":18
>       SUBDATASET_8_DESC=[391x78] Rrs_670 (16-bit integer)
>      
>     SUBDATASET_9_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":19
>       SUBDATASET_9_DESC=[391x78] chlor_a (32-bit floating-point)
>      
>     SUBDATASET_10_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":20
>       SUBDATASET_10_DESC=[391x78] Kd_490 (16-bit integer)
>      
>     SUBDATASET_11_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":21
>       SUBDATASET_11_DESC=[391x78] pic (16-bit integer)
>      
>     SUBDATASET_12_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":22
>       SUBDATASET_12_DESC=[391x78] poc (16-bit integer)
>      
>     SUBDATASET_13_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":23
>       SUBDATASET_13_DESC=[391x78] cdom_index (16-bit integer)
>      
>     SUBDATASET_14_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":24
>       SUBDATASET_14_DESC=[391x78] par (16-bit integer)
>      
>     SUBDATASET_15_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":25
>       SUBDATASET_15_DESC=[391x78] l2_flags (32-bit integer)
>      
>     SUBDATASET_16_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":34
>       SUBDATASET_16_DESC=[391x3] orb_vec (32-bit floating-point)
>      
>     SUBDATASET_17_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":35
>       SUBDATASET_17_DESC=[391x3] sun_ref (32-bit floating-point)
>      
>     SUBDATASET_18_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":36
>       SUBDATASET_18_DESC=[391x3] att_ang (32-bit floating-point)
>      
>     SUBDATASET_19_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":37
>       SUBDATASET_19_DESC=[391x3x3] sen_mat (32-bit floating-point)
>      
>     SUBDATASET_20_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":38
>       SUBDATASET_20_DESC=[391x6] scan_ell (32-bit floating-point)
>      
>     SUBDATASET_21_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":39
>       SUBDATASET_21_DESC=[391x8] nflag (32-bit integer)
>      
>     SUBDATASET_22_NAME=HDF4_SDS:SEAWIFS_L2:"S1998031140424.L2_MLAC_OC.x.hdf":42
>       SUBDATASET_22_DESC=[20x2] tilt_ranges (16-bit integer)
>     Corner Coordinates:
>
>     _______________________________________________
>     gdal-dev mailing list
>     gdal-dev at lists.osgeo.org <mailto:gdal-dev at lists.osgeo.org>
>     http://lists.osgeo.org/mailman/listinfo/gdal-dev
>
>

-------------- next part --------------
Skipped content of type multipart/related