U. S. Geological Survey Open-File Report 99-404

Sandoval-Santa Fe and Belen Surveys, New Mexico, flown in 1998 by Sander
    Geophysics
Cochiti Survey, New Mexico, flown in 1997 by Geoterrex as part of a
    time-domain electromagnetic survey

FINAL GRID DATA
ARC/INFO Grid Export format (ssmag.e00, bmag.e00, and cmag.e00)
----------------------------------------------------------------------
This format is readable by ARC/INFO, ERDAS IMAGINE, ARC/VIEW, and 
other packages. When imported into ARC/INFO and ARC/VIEW, the file 
will unpack into a directory containing all the components of the 
registered grid coverage.   The ARCGRID module in ARC/INFO
and SPATIAL ANALYST in ARC/VIEW will allow display in color shaded- 
relief.  As an example, the command to import the grid file
ssmag.e00 in ARC/INFO is

import grid ssmag ssmag
__________________________________________________________________________
SSMAG.E00 - Sandoval-Santa Fe survey levelled and decorrugated
              total-magnetic intensity, tie-line data not included.

          Description of ssmag.e00 grid

Cell Size =              50.000 m        Data Type: Floating Point
Number of Rows    =        1729
Number of Columns =        1930
 
           BOUNDARY                                STATISTICS
 
Xmin =               324925.000         Minimum Value = -1719.798
Xmax =               421425.000         Maximum Value =  1664.864
Ymin =              3909475.000         Mean          =  -274.461
Ymax =              3995925.000         Standard Deviation = 189.453
 
                          COORDINATE SYSTEM DESCRIPTION
 
Projection                  UTM
Zone                         13
Units                    METERS             Spheroid
CLARKE 1866 (North American Datum 1927)
__________________________________________________________________________
BMAG.E00 - Belen survey levelled and decorrugated total-magnetic
              intensity, tie-line data not included.

          Description of bmag.e00 grid

Cell Size =              50.000 m        Data Type: Floating Point
Number of Rows    =         691
Number of Columns =        1164
 
           BOUNDARY                                STATISTICS
 
Xmin =               303625.000         Minimum Value = -465.099
Xmax =               361825.000         Maximum Value = 22.253
Ymin =              3810875.000         Mean          = -251.933
Ymax =              3845425.000         Standard Deviation = 91.280
 
                          COORDINATE SYSTEM DESCRIPTION
 
Projection                  UTM
Zone                         13
Units                    METERS             Spheroid
CLARKE 1866 (North American Datum 1927)
__________________________________________________________________________
CMAG.E00 - Cochiti survey levelled total-magnetic intensity, tie-line
              data included.  A constant of 51850 was subtracted from
              the contractor's original values before gridding.

          Description of cmag.e00 grid
          
Cell Size =             100.000 m         Data Type: Floating Point
Number of Rows    =         214
Number of Columns =         282
 
           BOUNDARY                                STATISTICS
 
Xmin =               367050.000         Minimum Value = -1457.609
Xmax =               395250.000         Maximum Value = 1030.488
Ymin =              3930450.000         Mean          = -302.389
Ymax =              3951850.000         Standard Deviation = 125.938
 
                          COORDINATE SYSTEM DESCRIPTION
 
Projection                  UTM
Zone                         13
Units                    METERS             Spheroid
CLARKE 1866 (North American Datum 1927)