X_UPDATE(1) Generic Mapping Tools X_UPDATE(1)NAMEx_update - Archiving of Cross-Over Information
SYNOPSISx_update cross-overfile [ -Xxbase ] [ -Llegbase ] [ -V ] [ -Wmax ]
DESCRIPTIONx_update reads the ASCII file produced by x_over and writes the infor‐
mation to the database files xx_base.b and xx_legs.b (unless other
filenames are specified on the command line) using a compact, binary
format. The options recognized are:
-X Indicate alternate xx_base.b file.
-L Indicate alternate xx_legs.b file.
-V Selects verbose mode, which will send progress reports to stderr
[Default runs "silently"]. Reports the pair currently being
processed.
-W Prints a warning if the number of COEs generated by any pair of
legs exceed max.
BEWARE
For security reasons the xx_legs.b are first renamed to xx_legs.b_old,
to prevent loss of information if a black-out or system crash should
occur during writing of the new xx_legs.b file. It is recommended that
the old file is left on the disk in case of other disasters. Note that
x_update does not check if a pair of legs already exist in the
xx_base.b file. It is the user's responsibility to ensure that duplica‐
tion of information does not occur. Should some pairs already in the
database need to be re-examined, then run x_remove which will wipe out
all traces of the specified cruises from the x_system data base files.
Now we can pass the pairs that need to be redone through
x_over/x_update again.
SEE ALSOGMT(1), x_system(1)REFERENCES
Wessel, P. XOVER: A Cross-over Error Detector for Track Data, Computers
& Geosciences, 15, 333-346.
GMT 4.5.14 1 Nov 2015 X_UPDATE(1)
