x_remove(1gmt) [debian man page]

X_REMOVE(1gmt)						       Generic Mapping Tools						    X_REMOVE(1gmt)

NAME

       x_remove - Remove COEs for Selected Cruises from the Data Base

SYNOPSIS

       x_remove removefile [ -Xxbase ] [ -Llegbase ] [ -V ]

DESCRIPTION

       x_remove  will read a list of 'bad' cruises, read the XSYSTEM data base files, and write out new XSYSTEM files that do not include any COEs
       generated by the bad cruises. This is useful if certain cruises turn out to have systematic errors (e.g. the topography values  were  inad-
       vertently given as fathoms instead of meters), and we would like to re-run x_over/x_update after the systematic errors have been rectified.
       The new file names will consist of the old file names with the suffix _new appended.

       -X     Indicates alternate xbase file [Default is xx_base.b].

       -L     Indicates alternate legbase file [Default is xx_legs.b].

       -V     Selects verbose mode, which will send progress reports to stderr [Default runs "silently"].

SEE ALSO

       GMT(1), x_system(1)

REFERENCES

       Wessel, P. XOVER: A Cross-over Error Detector for Track Data, Computers & Geosciences, 15, 333-346.

GMT 4.5.7							    15 Jul 2011 						    X_REMOVE(1gmt)

X_UPDATE(1gmt)						       Generic Mapping Tools						    X_UPDATE(1gmt)

NAME

       x_update - Archiving of Cross-Over Information

SYNOPSIS

       x_update cross-overfile [ -Xxbase ] [ -Llegbase ] [ -V ] [ -Wmax ]

DESCRIPTION

       x_update  reads	the  ASCII  file produced by x_over and writes the information 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  pro-
	      cessed.

       -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 ALSO

       GMT(1), x_system(1)

REFERENCES

       Wessel, P. XOVER: A Cross-over Error Detector for Track Data, Computers & Geosciences, 15, 333-346.

GMT 4.5.7							    15 Jul 2011 						    X_UPDATE(1gmt)