[gdal-dev] get the info of the hdf4 tranlate hdf4 to tif

[Chaitanya kumar CH]

apachemaven,

2009/3/27 apachemaven <apachemaven at yeah.net>:
> I want to translate the hdf4 to tif ,and use the grass to conert this tif to
> its own format, then I can contiune my next work, I use the FWTools2.2.8
> (which is installed in the F disk.)to handle this,after config the
> environment ,I run the command "gdalinfo
> d:\data\HDF\MOD02HKM.A2008275.0245.005.2008275112555.hdf", it worked , the
> key inofrmation is :
> ===============
> ................
> ................
> Subdatasets:
>
> SUBDATASET_1_NAME=HDF4_EOS:EOS_SWATH:"D:\data\HDF\MOD02HKM.A2008275.0245.005.2008275112555.hdf":MODIS_SWATH_Type_L1B:EV_500_RefSB
>   SUBDATASET_1_DESC=[5x4060x2708] EV_500_RefSB MODIS_SWATH_Type_L1B (16-bit
> unsigned integer)
>
> SUBDATASET_2_NAME=HDF4_EOS:EOS_SWATH:"D:\data\HDF\MOD02HKM.A2008275.0245.005.2008275112555.hdf":MODIS_SWATH_Type_L1B:EV_500_RefSB_Uncert_Indexes
>   SUBDATASET_2_DESC=[5x4060x2708] EV_500_RefSB_Uncert_Indexes
> MODIS_SWATH_Type_L1B (8-bit unsigned integer)
>
> SUBDATASET_3_NAME=HDF4_EOS:EOS_SWATH:"D:\data\HDF\MOD02HKM.A2008275.0245.005.2008275112555.hdf":MODIS_SWATH_Type_L1B:EV_250_Aggr500_RefSB
>   SUBDATASET_3_DESC=[2x4060x2708] EV_250_Aggr500_RefSB MODIS_SWATH_Type_L1B
> (16-bit unsigned integer)
>
> SUBDATASET_4_NAME=HDF4_EOS:EOS_SWATH:"D:\data\HDF\MOD02HKM.A2008275.0245.005.2008275112555.hdf":MODIS_SWATH_Type_L1B:EV_250_Aggr500_RefSB_Uncert_Indexes
>   SUBDATASET_4_DESC=[2x4060x2708] EV_250_Aggr500_RefSB_Uncert_Indexes
> MODIS_SWATH_Type_L1B (8-bit unsigned integer)
>
> SUBDATASET_5_NAME=HDF4_EOS:EOS_SWATH:"D:\data\HDF\MOD02HKM.A2008275.0245.005.2008275112555.hdf":MODIS_SWATH_Type_L1B:EV_250_Aggr500_RefSB_Samples_Used
>   SUBDATASET_5_DESC=[2x4060x2708] EV_250_Aggr500_RefSB_Samples_Used
> MODIS_SWATH_Type_L1B (8-bit integer)
> ===============
> and now (for example )I want to get the subdataset 4,and translate it to
> geotiff,before run the gdal_translate I run the gdalinfo again to get the
> information of it:"
> gdalinfo
> HDF4_EOS:EOS_SWATH:"D:\data\HDF\MOD02HKM.A2008275.0245.005.2008275112555.hdf":MODIS_SWATH_Type_L1B:EV_250_Aggr500_RefSB_Uncert_Indexes"
> I got the error messages as follows:
> ========================
> C:\Documents and Settings\Administrator>gdalinfo
> HDF4_EOS:EOS_SWATH:"D:\data\HDF\MOD02HKM.A2008275.0245.005.2008275112555.hdf":MODIS_SWATH_Type_L1B:EV_250_Aggr500_RefSB_Uncert_Indexes
> ERROR 4:
> `HDF4_EOS:EOS_SWATH:D:\data\HDF\MOD02HKM.A2008275.0245005.2008275112555.hdf:MODIS_SWATH_Type_L1B:EV_250_Aggr500_RefSB_Uncert_Indexes'
> does not exist in the file system,and is not recognised as a supported
> dataset name.
> gdalinfo failed - unable to open
> 'HDF4_EOS:EOS_SWATH:D:\data\HDF\MOD02HKM.A2008275.0245.005.20082751
> 12555.hdf:MODIS_SWATH_Type_L1B:EV_250_Aggr500_RefSB_Uncert_Indexes'.

Perhaps, the problem is with the colon (:) in the path. There may be
some confusion with the path. Try to work around the colon by mounting
the D drive on any other folder in the F drive and provide a relative
path to the FWTools' bin folder. Let me know how it goes.

> Open GDAL Datasets:
>   1 N DriverIsNULL      -1 512x512x0
> ========================
> I want to know why?and if I put the hdf data under the F:\anzhuang\FWTools
> 2.2.8\bin, I can get the correct result......
>
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>

Regards,
-- 
Chaitanya kumar CH.