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

HDF_AN_START

HDF_AN_START

This function initializes the HDF AN interface for the specified file. A call to HDF_AN_START is required before any HDF AN functions can be invoked. HDF_AN_START is used with the HDF_AN_END function to define the extent of an HDF AN session. A call to HDF_AN_END is required for each call to HDF_AN_START.

Syntax


Result = HDF_AN_START(file_id)

Return Value


Returns the HDF AN interface identifier (Annotation_id) if successful or FAIL (-1) otherwise.

Arguments


File_id

File identifier returned by HDF_OPEN. Note that each call to HDF_OPEN must be terminated with a call to HDF_CLOSE.

Keywords


None

Version History


5.2

Introduced



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