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The HDF_SD_GETINFO procedure retrieves information about an SD dataset.
CAUTION: Reading a label, unit, format, or coordinate system string that has more than 256 characters can have unpredictable results.
Set this keyword to a named variable in which the calibration data associated with the SD dataset is returned. The data is returned in a structure of the form:
For more information about calibration data, see the documentation for HDF_SD_SETINFO.
Set this keyword to a named variable in which the coordinate system description string is returned.
Set this keyword to a named variable in which the dimensions of the SD dataset are returned. For efficiency, these dimensions are returned in reverse order from their HDF format unless the NOREVERSE keyword is also set.
Set this keyword to a named variable in which the fill value of the SD dataset is returned. Note that a fill value must be set in the SD dataset. If a fill value is not set, the value of the variable named by this keyword will be undefined, and IDL will issue a warning message.
Set this keyword to a named variable in which the format description string is returned. If the format description string is not present, this variable will contain an empty string.
Set this keyword to a named variable in which the HDF type of the SD dataset is returned as a scalar string. Possible returned values are
DFNT_NONE
,
DFNT_CHAR
,
DFNT_FLOAT32
,
DFNT_FLOAT64
,
DFNT_INT8
,
DFNT_INT16
,
DFNT_INT32
,
DFNT_UINT8
,
DFNT_UINT16
, and
DFNT_UINT32
.
Set this keyword to a named variable in which the label description string is returned. If the label description string is not present, this variable will contain an empty string.
Set this keyword to a named variable in which the SD dataset name is returned. If the SD dataset name is not present, this variable will contain an empty string.
Set this keyword to a named variable in which the number of "NetCDF-style" attributes for the SD dataset is returned.
Set this keyword to a named variable in which the number of dimensions in the dataset is returned.
Set this keyword in conjunction with DIMS to return the variable dimensions in non-reversed form. By default, IDL reverses data and dimensions from the HDF format to improve efficiency.
Set this keyword to a named variable in which the maximum and minimum of the current SD dataset is returned as a two-element vector. Note that a range must be set in the SD dataset. If the range is not set, the value of the variable named by this keyword will be undefined, and IDL will issue a warning message.