to Top Menu	Program "gtrf" Translate IGRF residual GRID data into another reference model.
Working Dir.
LOG Filename
Input source Filename
Survey Year
Old RF model	0: by Gen.No. 1: IGRF 2: DGRF 3: PGRF (RF base year / Generation number)
New RF model	0: by Gen.No. 1: IGRF 2: DGRF 3: PGRF (RF base year / Generation number)
Name-label for new file	(areaname)
Output Filename	(new)