NITF Functions: Getting and Setting Header Information
L_NITFGetGraphicHeaderCount
L_NITFGetGraphicHeader
L_NITFSetGraphicHeader
L_NITFGetImageHeaderCount
L_NITFGetImageHeader
L_NITFSetImageHeader
L_NITFGetTextHeaderCount
L_NITFGetTextHeader
L_NITFSetTextHeader
L_NITFGetNITFHeader
L_NITFSetNITFHeader