United States Department of the Interior
U.S. Geological Survey
Fixed Wing Aeromagnetic Survey in Wisconsin

Wiscmag.gxf -> Gridded magnetic data in Geosoft gxf format

Spheroid:               Clarke 1866 (NAD27)
Projection:             UTM
Local Datum:            Mean Continental United States, offset x=8,y=-160,z=-176
Central Meridian:       87 degrees West (-87 degrees)
False Easting:          500000
False Northing:         0
Grid Origin:            127600 4703400
Grid Interval:          dx=200, dy=200
Grid Rotation:          0

#COMMENT
USGS modified GXF format - projection info not standard GXF
#TITLE
 "Residual Magnetic Data + 56225 (nT), Southern Wisconsin"
#POINTS
 1960
#ROWS
 1894
#PTSEPARATION
 200.0
#RWSEPARATION
 200.0
#XORIGIN
 127600.0
#YORIGIN
 4703400.0
#ROTATION
 .0
#SENSE
 1
#UNIT_LENGTH
 m 1.0
#PRJTYPE
universal transverse mercator
#PRJUNIT
meters
#A_AXIS_RADIUS
6378206.40
#B_AXIS_RADIUS
6356583.80
#RFLONGITUDE
-87.00000
#RFLATITUDE
.0
#FLSEASTING
500000.
#FLSNORTHING
.0
#TRANSFORM
 1.0 .0 "m"
#DUMMY
 -999999.0
#GRID                                                                           
 -999999.0 -999999.0 -999999.0 -999999.0 -999999.0 -999999.0 -999999.0 -999999.0
 -999999.0 -999999.0 -999999.0 -999999.0 -999999.0 -999999.0 -999999.0 -999999.0
        .         .         .         .         .         .         .         . 
        .         .         .         .         .         .         .         . 
        .         .         .         .         .         .         .         .