How to add hdf files to map file?

[wlx]

 Hi,
      If the subdataset included multi bands data,how did the mapserver or
gdal deal with it? And what extent should I use,the image coordinate or
geographic coordinate?
      Thanks.

LiangXu Wang


>
> wlx wrote:
> > Hi,
> >     Gdal  has included hdf4 file format's support from version
> > 1.2.3,and I has installed it in my debian system.But I
> don't know how
> > to add hdf's subdataset to map file as a layer,so can
> someone help me?
>
> LiangXu Wang,
>
> If you run gdalinfo on a complex HDF file you will see a list
> of subdatasets.
>
> Stuff like:
>
> Subdatasets:
>
> SUBDATASET_1_NAME=HDF4_EOS:EOS_SWATH:"/u/data/hdf/MOD07_L2.A20
> 00110.0220.002.2
> 000196104217.hdf":mod07:Scan_Start_Time
>    SUBDATASET_1_DESC=[406x270] Scan_Start_Time (64-bit floating-point)
>
> SUBDATASET_2_NAME=HDF4_EOS:EOS_SWATH:"/u/data/hdf/MOD07_L2.A20
> 00110.0220.002.2
> 000196104217.hdf":mod07:Solar_Zenith
>    SUBDATASET_2_DESC=[406x270] Solar_Zenith (16-bit integer)
>
> SUBDATASET_3_NAME=HDF4_EOS:EOS_SWATH:"/u/data/hdf/MOD07_L2.A20
> 00110.0220.002.2
> 000196104217.hdf":mod07:Solar_Azimuth
>    SUBDATASET_3_DESC=[406x270] Solar_Azimuth (16-bit integer)
>
> SUBDATASET_4_NAME=HDF4_EOS:EOS_SWATH:"/u/data/hdf/MOD07_L2.A20
> 00110.0220.002.2
> 000196104217.hdf":mod07:Sensor_Zenith
>    SUBDATASET_4_DESC=[406x270] Sensor_Zenith (16-bit integer)
>
> SUBDATASET_5_NAME=HDF4_EOS:EOS_SWATH:"/u/data/hdf/MOD07_L2.A20
> 00110.0220.002.2
> 000196104217.hdf":mod07:Sensor_Azimuth
>    SUBDATASET_5_DESC=[406x270] Sensor_Azimuth (16-bit integer)
>
> SUBDATASET_6_NAME=HDF4_EOS:EOS_SWATH:"/u/data/hdf/MOD07_L2.A20
> 00110.0220.002.2
> 000196104217.hdf":mod07:Brightness_Temperature
>
>
>
> Take the SUBDATASET_n_NAME you want, and use that in your
> DATA statement in your mapfile.  Make sure you use single
> quotes around it since the name itself includes double quotes.
>
> eg.
>
>    DATA
> 'HDF4_EOS:EOS_SWATH:"/u/data/hdf/MOD07_L2.A2000110.0220.002.20
00196104217.hdf":mod07:Brightness_Temperature'
>
> Also, make sure you use absolute paths since the SHAPEPATH
> and other MapServer path manipulation won't work properly in
> these dataset names since they are not just the name of a
> simple filesystem object.
>
> I hope this helps.
>
> Best regards,
> --
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> ----------
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>
>
>