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B.1.2 Binary tables

GMT programs also support binary tables to speed up input-output for i/o-intensive tasks like gridding and preprocessing. Files may have no header (hence the -–H option cannot be used) and all data must either be single or double precision (no mixing allowed). Multiple segment files are allowed (-M) and the segment headers are assumed to be records where all the fields equal NaN. Flags appended to -M are ignored. The format and number of fields are specified with the -–b option. Thus, for input you may set -–bi[s][n], where s designates single precision (default is double) and n is the number of fields. For output, use -bo[s] (the programs know how many columns to write).



Paul Wessel 2001-04-18