The GSLib (.out) interpolation output format has a short header area that provides information for mapping. The first header record (shown on 2 lines below because of page width limitations) contains x and y coordinate information needed for mapping. The second record states the number of fields per data record, and the next records contain the names of the fields. Following the header records are records that contain a value for the Z-estimate and the estimation variance for that point (or estimation standard deviation if specified in the Interpolation Window). Data records begin in the NW corner of the grid.
The following listing is for the first few coordinates in a standard GSLib format file. The first record (shown on 2 lines because it is too long to display on one line) identifies the file as a GSLib output file and provides coordinate spacing information. Record two states that there are 3 fields per record, and records 3-5 provide the names of the fields.
GS+ Output: Punctual Kriging Interpolation File v9.0; GSLib format: nx=3; xmin=5.0000; xsiz=10.0000; ny=6; ymin=5.0000; ysiz=10.0000
3
Z-Estimate
EstimationVariance
Neighbors
3.98 6.7825 8
0.34 5.1996 8
1.45 4.5482 8
3.14 5.2250 8
7.67 4.8409 8
0.61 6.2536 8
1.05 4.8234 8
0.86 5.1885 8
3.41 3.9369 8
1.03 5.7149 8
1.44 5.7889 8
2.14 6.2928 8
1.53 6.2740 8
1.15 4.7431 8
0.98 7.2801 8
2.29 9.9600 8
2.28 9.9919 8
2.10 9.9002 8