This function returns the HDF reference number of the raster image identified by the parameter ri_id. This routine is commonly used for the purpose of annotating the raster image or including the raster image within an HDF Vgroup.
Result = HDF_GR_IDTOREF(ri_id)
Returns the HDF reference number of the raster image if successful or not found (0) otherwise.
Raster image identifier returned by HDF_GR_SELECT or HDF_GR_CREATE.
None.
Introduced: 5.2