to Top Menu	Program "ggrids" Generate grid data of magnetic field and observation altitude from DPAM line data or equivalent, by the method developed by Smith and Wessel [1990].
Working Dir.
LOG Filename
Input data File-type	1: DPAM 2: DB-gsj3: DB-nedo 4: StdLIN0: Generic     Ref. / Ref.J
Line/random Input data
Geodetic reference	1: WGS 2: Tokyo     Alt.ref. 1: above Ellipsoid 2: above Geoid   0: NGA GSI2008 GSI2011 Geoid
(Data spec. if Generic type)	Lat./Long. unit 1: Min. 2: Deg. 3: D:Min.     Lat./Long. data positions                                                     Alt./Mag. data positions
Trimming radius	(km)
Name-label for new file	(areaname)
Projection number	(+800 for Old-TOKYO)
(Origin Lat. unless UTM)	(in deg. and min.)
(Origin Long. unless UTM)	(in deg. and min.)
	Alt.ref. 1: above Ellipsoid 2: above Geoid   0: NGA GSI2008 GSI2011 Geoid
Grid Location Parameters	/   SW corner Northing / Easting (km)    /   Mesh size (m) in NS / EW    /   Number of mesh to N / E [count both end]
Output Filename	(new)