1MGD77INFO(1) Generic Mapping Tools MGD77INFO(1)
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6 mgd77info - Get information about MGD77[+] files
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9 mgd77info NGDC-ids [ -C[m|e] ] [ -E[m|e] ] [ -Iignore ] [
10 -Mf[item]|r|e|h ] [ -L[v] ] [ -V ]
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13 mgd77info reads <legid>.[mgd77|nc] files and produces a single record
14 of information about each cruise specified. The information includes
15 beginning and end times, total track distances in km, longitude and
16 latitude range, and the total number of geophysical observations.
17 Optionally, choose instead to see the original MGD77 header meta-data
18 section or its individual members.
19 If you need to know which tracks are crossing through a given region
20 and what kinds of geophysical observations are available, consider
21 using the x2sys tools to set up a tracks index data base (see
22 x2sys_init for more information).
23 NGDC-ids
25 Can be one or more of five kinds of specifiers:
26 1) 8-character NGDC IDs, e.g., 01010083, JA010010etc., etc.
27 2) 2-character <agency> codes which will return all cruises from
28 each agency.
29 3) 4-character <agency><vessel> codes, which will return all
30 cruises from those vessels.
31 4) =<list>, where <list> is a table with NGDC IDs, one per line.
32 5) If nothing is specified we return all cruises in the data
33 base.
34 (See mgd77info -L for agency and vessel codes). The ".mgd77" or
35 ".nc" extensions will automatically be appended, if needed (use
36 -I to ignore certain file types). Cruise files will be looked
37 for first in the current directory and second in all directories
38 listed in $MGD77_HOME/mgd77_paths.txt [If $MGD77_HOME is not set
39 it will default to $GMT_SHAREDIR/mgd77].
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42 No space between the option flag and the associated arguments.
43 -C List abbreviations for all columns present in the MGD77[+]
45 files. Append m or e to limit the display to the MGD77 standard
46 or MGD77+ extended set only.
47 -E Give a one-line summary for each cruise listed.
49 -M List the meta-data (header) and (if present) the MGD77+ history
51 for each cruise. Append f for a formatted display. This will
52 list individual parameters and their values, one entry per out‐
53 put line, in a format that can be searched using standard UNIX
54 text tools. Alternatively, append the name of a particular
55 parameter (you only need to give enough characters - starting at
56 the beginning - to uniquely identify the item). Give - to dis‐
57 play the list of all parameter names. You may also specify the
58 number of a parameter. For the raw, punchcard-formatted MGD77
59 original header block, append r instead. For the MGD77+ E77
60 status, append e instead. Finally, for the MGD77+ history,
61 append h instead.
62 -I Ignore certain data file formats from consideration. Append
64 a|c|t to ignore MGD77 ASCII, MGD77+ netCDF, or plain tab-sepa‐
65 rated ASCII table files, respectively. The option may be
66 repeated to ignore more than one format. [Default ignores
67 none].
68 -L No cruise information is listed. Instead, we just display a
70 list of the GEODAS institution 2-character codes and their
71 names. Optionally, append v to also display the vessels and
72 their 4-character codes for each institution. The following is
73 the list of institutions:
74 (01) LAMONT (LDEO), (02) WOODS HOLE O.I., (03) NOAA, (04) US
75 ARMY, (05) NEW ZEALAND, (06) US GEOL. SURVEY, (07) OREGON ST.
76 UNIV, (08) U.HAWAII SOEST, (09) US NAVY, (10) UNIV OF TEXAS,
77 (11) RICE UNIV., (12) CANADA, (13) UNIV OF CONN., (14) U.MIAMI
78 (RSMAS), (15) SCRIPPS INST.OC, (16) CHINA, (17) U RHODE ISLAND,
79 (18) DUKE UNIVERSITY, (19) UNITED KINGDOM, (20) U.WASHINGTON,
80 (22) WESTERN GEOPHY., (23) TEXAS A&M UNIV., (24) AUSTRALIA, (25)
81 MONACO, (29) RUSSIA, (30) SPAIN, (35) NIMA, (58) NETHERLANDS,
82 (60) MIN MGMT SVC, (63) ISRAEL, (67) FRANCE, (71) SOUTH AFRICA,
83 (75) US COAST GUARD, (76) BRAZIL, (77) INT. GRAV. BUR, (83) GER‐
84 MANY, (84) ORSTOM NEW CAL, (86) CUBA, (87) ARGENTINA, (88) US
85 NSF, (89) INDIA, (90) PORTUGAL, (92) FINLAND, (93) CHILE, (J1)
86 HYDR DEPT JAPAN, (J2) GEOL SRVY JAPAN, (J4) UNIV TOKYO, (J5)
87 KOBE UNIV, (J7) UNIV OF RYUKYUS, (J8) J.O.D.C. JAPAN, (J9) CHIBA
88 UNIV, (JA) INST.POLAR RES., (ZZ) INST NOT CODED.
89 -V Selects verbose mode, which will send progress reports to stderr
91 [Default runs "silently"].
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94 To get one-line summary information about the cruises 01010047.mgd77
95 and 01010008.mgd77, try
96 mgd77info 01010047 01010008 -E > listing.lis
98 To see the original raw MGD77 header meta-data for cruise
100 01010047.mgd77, run
101 mgd77info 01010047 -Mr
103 To determine all the parameters related to Gravity during cruise
105 01010047.mgd77, run
106 mgd77info 01010047 -Mf | grep Gravity
108 To determine the Magnetic sampling rate used during cruise
110 01010047.mgd77, run
111 mgd77info 01010047 -MfMagnetics_Sampling_Rate
113 To see all the columns that the MGD77+ cruise 01010047.nc contains, run
115 mgd77info 01010047 -C
117 To see the E77 status of all MGD77+ cruises collected by the University
119 of Hawaii, run
120 mgd77info 08 -Ia -Me
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124 mgd77list(1), mgd77manage(1), mgd77path(1), mgd77track(1) x2sys_init(1)
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127 Wessel, P., and W. H. F. Smith, 2009, The Generic Mapping Tools (GMT)
128 version 4.5.0 Technical Reference & Cookbook, SOEST/NOAA.
129 Wessel, P., and W. H. F. Smith, 1998, New, Improved Version of Generic
130 Mapping Tools Released, EOS Trans., AGU, 79 (47), p. 579.
131 Wessel, P., and W. H. F. Smith, 1995, New Version of the Generic Map‐
132 ping Tools Released, EOS Trans., AGU, 76 (33), p. 329.
133 Wessel, P., and W. H. F. Smith, 1995, New Version of the Generic Map‐
134 ping Tools Released, http://www.agu.org/eos_elec/95154e.html, Copyright
135 1995 by the American Geophysical Union.
136 Wessel, P., and W. H. F. Smith, 1991, Free Software Helps Map and Dis‐
137 play Data, EOS Trans., AGU, 72 (41), p. 441.
138 The Marine Geophysical Data Exchange Format - "MGD77", see
139 http://www.ngdc.noaa.gov/mgg/dat/geodas/docs/mgd77.txt
140GMT 4.5.6 10 Mar 2011 MGD77INFO(1)