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Chapter 3 Scientific Data Sets (SD API)

3.1 Chapter Overview
3.2 The Scientific Data Set Data Model
3.2.1 Required SDS Components
3.2.2 Optional SDS Components
3.2.3 Annotations and the SD Data Model
3.3 The SD Interface
3.3.1 Header and Include Files Used by the SD Interface
3.3.2 SD Interface Routines
3.3.3 Tags in the SD Interface
3.4 Programming Model for the SD Interface
3.4.1 Establishing Access to Files and Data Sets: SDstart, SDcreate, and SDselect
3.4.2 Terminating Access to Files and Data Sets: SDendaccess and SDend
3.5 Writing Data to an SDS
3.5.1 Writing Data to an SDS Array: SDwritedata
3.5.1.1 Filling an Entire Array
3.5.1.2 Writing Slabs to an SDS Array
3.5.1.3 Appending Data to an SDS Array along an Unlimited Dimension
3.5.1.4 Determining whether an SDS Array is Appendable: SDisrecord
3.5.1.5 Setting the Block Size: SDsetblocksize
3.5.2 Compressing SDS Data: SDsetcompress
3.5.3 External File Operations
3.5.3.1 Specifying the Directory Search Path of an External File: HXsetdir
3.5.3.2 Specifying the Location of the Next External File to be Created: HXsetcreatedir
3.5.3.3 Creating a Data Set with Data Stored in an External File: SDsetexternalfile
3.5.3.4 Moving Existing Data to an External File
3.6 Reading Data from an SDS Array: SDreaddata
3.7 Obtaining Information about SD Data Sets
3.7.1 Obtaining Information about the Contents of a File: SDfileinfo
3.7.2 Obtaining Information about a Specific SDS: SDgetinfo
3.7.3 Determining whether an SDS is empty: SDcheckempty
3.7.4 Locating an SDS by Name: SDnametoindex
3.7.5 Locating an SDS by Reference Number: SDreftoindex
3.7.6 Obtaining the Reference Number Assigned to the Specified SDS: SDidtoref
3.7.7 Creating SDS Arrays Containing Non-standard Length Data: SDsetnbitdataset
3.8 SDS Dimension and Dimension Scale Operations
3.8.1 Selecting a Dimension: SDgetdimid
3.8.2 Naming a Dimension: SDsetdimname
3.8.3 Old and New Dimension Implementations
3.8.3.1 Setting the Future Compatibility Mode of a Dimension: SDsetdimval_comp
3.8.3.2 Determining the Current Compatibility Mode of a Dimension: SDisdimval_bwcomp
3.8.4 Dimension Scales
3.8.4.1 Writing Dimension Scales: SDsetdimscale
3.8.4.2 Obtaining Dimension Scale and Other Dimension Information: SDdiminfo
3.8.4.3 Reading Dimension Scales: SDgetdimscale
3.8.4.4 Distinguishing SDS Arrays from Dimension Scales: SDiscoordvar
3.8.5 Related Data Sets
3.9 User-defined Attributes
3.9.1 Creating or Writing User-defined Attributes: SDsetattr
3.9.2 Querying User-defined Attributes: SDfindattr and SDattrinfo
3.9.3 Reading User-defined Attributes: SDreadattr
3.10 Predefined Attributes
3.10.1 Accessing Predefined Attributes
3.10.2 SDS String Attributes
3.10.2.1 Writing String Attributes of an SDS: SDsetdatastrs
3.10.2.2 Reading String Attributes of an SDS: SDgetdatastrs
3.10.3 String Attributes of Dimensions
3.10.3.1 Writing a String Attribute of a Dimension: SDsetdimstrs
3.10.3.2 Reading a String Attribute of a Dimension: SDgetdimstrs
3.10.4 Range Attributes
3.10.4.1 Writing a Range Attribute: SDsetrange
3.10.4.2 Reading a Range Attribute: SDgetrange
3.10.5 Fill Values and Fill Mode
3.10.5.1 Writing a Fill Value Attribute: SDsetfillvalue
3.10.5.2 Reading a Fill Value Attribute: SDgetfillvalue
3.10.5.3 Setting the Fill Mode for all SDSs in the Specified File: SDsetfillmode
3.10.6 Calibration Attributes
3.10.6.1 Setting Calibration Information: SDsetcal
3.10.6.2 Reading Calibrated Data: SDgetcal
3.11 Chunked (or Tiled) Scientific Data Sets
3.11.1 Making an SDS a Chunked SDS: SDsetchunk
3.11.2 Setting the Maximum Number of Chunks in the Cache: SDsetchunkcache
3.11.3 Writing Data to Chunked SDSs: SDwritechunk and SDwritedata
3.11.4 Reading Data from Chunked SDSs: SDreadchunk and SDreaddata
3.11.5 Obtaining Information about a Chunked SDS: SDgetchunkinfo
3.12 Ghost Areas
3.13 netCDF
3.13.1 HDF Interface vs. netCDF Interface

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HDF User's Guide - 05/19/99, NCSA HDF Development Group.