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Harris Geospatial / Docs Center / IDL Reference / I/O - HDF / HDF_SD_SELECT

HDF_SD_SELECT

HDF_SD_SELECT

The HDF_SD_SELECT function returns an SD dataset ID given the current SD interface ID, and the zero-based SD dataset index.

HDF_SD_FILEINFO can be used to determine the number of SD datasets in an HDF file, HDF_SD_REFTOINDEX can be used to find the index from its SD dataset ID, and HDF_SD_NAMETOINDEX can be used to find the index from its name.

Examples


; Open an HDF file:
SDinterface_id = HDF_SD_START('test.hdf')
; Access the first SD in the HDF file:
SDdataset_id_1=HDF_SD_SELECT(SDinterface_id, 0)
; End access to any SD ids:
HDF_SD_ENDACCESS, SDdataset_id_1
; Close the file:
HDF_SD_END, SDinterface_id

Syntax


Result = HDF_SD_SELECT(SDinterface_id, Number)

Return Value


Returns the specified SD dataset’s identifier.

Arguments


SDinterface_id

A SD interface ID as returned from HDF _SD_START.

Number

A zero-based SD dataset index.

Keywords


None

Version History


4.0

Introduced

See Also


HDF_SD_CREATE, HDF_SD_END, HDF_SD_ENDACCESS, HDF_SD_NAMETOINDEX, HDF_SD_REFTOINDEX, HDF_SD_SELECT, HDF_SD_START



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