mgd77info - Get information about MGD77 files

mgd77info leg-ids -I|L [ -V ]

mgd77info reads <legid>.mgd77 files and produces a single record of information about each cruise specified. The information includes beginning and end time, total track distance in km, min and max regional extent, and the total number of geophysical observations. Optionally, choose instead to see the original MGD77 header section.

If you need to know which tracks are crossing through a given region and what kinds of geogphysical observations are available, consider using the x2sys tools to set up a tracks index data base.

leg-ids

Can be one or more MGD77 8-character cruise identifiers. To give a list of names, use `cat cruises.lis`. The ".mgd77" extension will automatically be appended, if needed. Cruise files will be looked for in the current directory and in all directories listed in $MGD77_DIR/MGD77_paths.txt.

-I

Give a one-line summary for each cruise listed, OR

-L

Give the long MGD77 header section for each cruise listed.

No space between the option flag and the associated arguments

-V

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

To get one-line summary information about the cruises 01010047.mgd77 and 01010008.mgd77, try

mgd77info 01010047 01010008 -I > listing.lis

To see the MGD77 header for cruise 01010047.mgd77, run

mgd77info 01010047 -L

mgd77list(1gmt), mgd77track(1gmt) x2sys_init(1gmt)

Wessel, P., and W. H. F. Smith, 2004, The Generic Mapping Tools (GMT) version 4 Technical Reference & Cookbook, SOEST/NOAA.

Wessel, P., and W. H. F. Smith, 1998, New, Improved Version of Generic Mapping Tools Released, EOS Trans., AGU, 79 (47), p. 579.

Wessel, P., and W. H. F. Smith, 1995, New Version of the Generic Mapping Tools Released, EOS Trans., AGU, 76 (33), p. 329.

Wessel, P., and W. H. F. Smith, 1995, New Version of the Generic Mapping Tools Released, http: American Geophysical Union.

Wessel, P., and W. H. F. Smith, 1991, Free Software Helps Map and Display Data, EOS Trans., AGU, 72 (41), p. 441.