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The first data record may be preceded by 1 or more header records.
When using such files, make sure to use the -H option and set
the parameter N_HEADER_RECS in the .gmtdefaults4 file
(System default is 1 header record if -H is set; you may also
use -Hnrecs directly). Fields
within a record must be separated by spaces, tabs, or commas.
Each field can be an integer or floating-point number or a geographic
coordinate string using the [+-]dd[:mm[:ss]][WSNEwsne] format.
Thus, 12:30:44.5W, 17.5S, 1:00:05, and 200:45E are all valid input strings.
Next: B.1.1.2 Optional segment header
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Paul Wessel
2004-10-01