MGD77INFO(1) Generic Mapping Tools MGD77INFO(1)NAMEmgd77info - Get information about MGD77[+] files
SYNOPSISmgd77info NGDC-ids [ -C[m|e] ] [ -E[m|e] ] [ -Iignore ] [
-Mf[item]|r|e|h ] [ -L[v] ] [ -V ]
DESCRIPTIONmgd77info reads <legid>.[mgd77|nc] files and produces a single record
of information about each cruise specified. The information includes
beginning and end times, total track distances in km, longitude and
latitude range, and the total number of geophysical observations.
Optionally, choose instead to see the original MGD77 header meta-data
section or its individual members.
If you need to know which tracks are crossing through a given region
and what kinds of geophysical observations are available, consider
using the x2sys tools to set up a tracks index data base (see
x2sys_init for more information).
NGDC-ids
Can be one or more of five kinds of specifiers:
1) 8-character NGDC IDs, e.g., 01010083, JA010010etc., etc.
2) 2-character <agency> codes which will return all cruises from
each agency.
3) 4-character <agency><vessel> codes, which will return all
cruises from those vessels.
4) =<list>, where <list> is a table with NGDC IDs, one per line.
5) If nothing is specified we return all cruises in the data
base.
(See mgd77info-L for agency and vessel codes). The ".mgd77" or
".nc" extensions will automatically be appended, if needed (use
-I to ignore certain file types). Cruise files will be looked
for first in the current directory and second in all directories
listed in $MGD77_HOME/mgd77_paths.txt [If $MGD77_HOME is not set
it will default to $GMT_SHAREDIR/mgd77].
OPTIONS
No space between the option flag and the associated arguments.
-C List abbreviations for all columns present in the MGD77[+]
files. Append m or e to limit the display to the MGD77 standard
or MGD77+ extended set only.
-E Give a one-line summary for each cruise listed.
-M List the meta-data (header) and (if present) the MGD77+ history
for each cruise. Append f for a formatted display. This will
list individual parameters and their values, one entry per out‐
put line, in a format that can be searched using standard UNIX
text tools. Alternatively, append the name of a particular
parameter (you only need to give enough characters - starting at
the beginning - to uniquely identify the item). Give - to dis‐
play the list of all parameter names. You may also specify the
number of a parameter. For the raw, punchcard-formatted MGD77
original header block, append r instead. For the MGD77+ E77
status, append e instead. Finally, for the MGD77+ history,
append h instead.
-I Ignore certain data file formats from consideration. Append
a|c|m|t to ignore MGD77 ASCII, MGD77+ netCDF, MGD77T ASCII or
plain tab-separated ASCII table files, respectively. The option
may be repeated to ignore more than one format. [Default
ignores none].
-L No cruise information is listed. Instead, we just display a
list of the GEODAS institution 2-character codes and their
names. Optionally, append v to also display the vessels and
their 4-character codes for each institution. The following is
the list of institutions:
(01) LAMONT (LDEO), (02) WOODS HOLE O.I., (03) NOAA, (04) US
ARMY, (05) NEW ZEALAND, (06) US GEOL. SURVEY, (07) OREGON ST.
UNIV, (08) U.HAWAII SOEST, (09) US NAVY, (10) UNIV OF TEXAS,
(11) RICE UNIV., (12) CANADA, (13) UNIV OF CONN., (14) U.MIAMI
(RSMAS), (15) SCRIPPS INST.OC, (16) CHINA, (17) U RHODE ISLAND,
(18) DUKE UNIVERSITY, (19) UNITED KINGDOM, (20) U.WASHINGTON,
(22) WESTERN GEOPHY., (23) TEXAS A&M UNIV., (24) AUSTRALIA, (25)
MONACO, (29) RUSSIA, (30) SPAIN, (35) NIMA, (58) NETHERLANDS,
(60) MIN MGMT SVC, (63) ISRAEL, (67) FRANCE, (71) SOUTH AFRICA,
(75) US COAST GUARD, (76) BRAZIL, (77) INT. GRAV. BUR, (83) GER‐
MANY, (84) ORSTOM NEW CAL, (86) CUBA, (87) ARGENTINA, (88) US
NSF, (89) INDIA, (90) PORTUGAL, (92) FINLAND, (93) CHILE, (J1)
HYDR DEPT JAPAN, (J2) GEOL SRVY JAPAN, (J4) UNIV TOKYO, (J5)
KOBE UNIV, (J7) UNIV OF RYUKYUS, (J8) J.O.D.C. JAPAN, (J9) CHIBA
UNIV, (JA) INST.POLAR RES., (ZZ) INST NOT CODED.
-V Selects verbose mode, which will send progress reports to stderr
[Default runs "silently"].
EXAMPLES
To get one-line summary information about the cruises 01010047.mgd77
and 01010008.mgd77, try
mgd77info 01010047 01010008 -E > listing.lis
To see the original raw MGD77 header meta-data for cruise
01010047.mgd77, run
mgd77info 01010047 -Mr
To determine all the parameters related to Gravity during cruise
01010047.mgd77, run
mgd77info 01010047 -Mf | grep Gravity
To determine the Magnetic sampling rate used during cruise
01010047.mgd77, run
mgd77info 01010047 -Mf Magnetics_Sampling_Rate
To see all the columns that the MGD77+ cruise 01010047.nc contains, run
mgd77info 01010047 -C
To see the E77 status of all MGD77+ cruises collected by the University
of Hawaii, run
mgd77info 08 -Ia -Me
SEE ALSOmgd77list(1), mgd77manage(1), mgd77path(1), mgd77track(1)x2sys_init(1)REFERENCES
Wessel, P., and W. H. F. Smith, 2015, The Generic Mapping Tools (GMT)
version 4.5.14 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 Map‐
ping Tools Released, EOS Trans., AGU, 76 (33), p. 329.
Wessel, P., and W. H. F. Smith, 1995, New Version of the Generic Map‐
ping Tools Released, http://www.agu.org/eos_elec/95154e.html, Copyright
1995 by the American Geophysical Union.
Wessel, P., and W. H. F. Smith, 1991, Free Software Helps Map and Dis‐
play Data, EOS Trans., AGU, 72 (41), p. 441.
The Marine Geophysical Data Exchange Format - "MGD77", see
http://www.ngdc.noaa.gov/mgg/dat/geodas/docs/mgd77.txt
GMT 4.5.14 1 Nov 2015 MGD77INFO(1)
