Provided by: gmt_4.5.11-1build1_amd64 bug


       mgd77track - A shiptrack plotting program


       mgd77track  NGDC-ids  -Rwest/east/south/north[r] -Jparameters [ -A[c][size][,spacing] ]  [
       -B[p|s]parameters ] [ -Cf|g|e ] [ -Dastartdate ] [ -Dbstopdate ] [ -F ]  [  -Gd|tgap  ]  [
       -Iignore  ] [ -K ] [ -Ltrackticks ] [ -O ] [ -P ] [ -Sastartdist[u] ] [ -Sbstopdist[u] ] [
       -TT|t|dms,mc,mfs,mf,mfc ] [ -U[just/dx/dy/][c|label] ] [ -V ] [  -Wpen  ]  [  -X[a|c|r][x-
       shift[u]] ] [ -Y[a|c|r][y-shift[u]] ] [ -ccopies ]


       mgd77track reads NGDC MGD77 cruises and creates PostScript code that will plot one or more
       ship tracks on a map using the specified projection.  The PostScript code  is  written  to
       standard output.

              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
              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].

       -J     Selects the map projection. Scale is UNIT/degree, 1:xxxxx, or width in UNIT  (upper
              case  modifier).   UNIT is cm, inch, or m, depending on the MEASURE_UNIT setting in
              .gmtdefaults4, but this can be overridden on the command line by appending c, i, or
              m  to  the scale/width value.  When central meridian is optional, default is center
              of longitude range on -R option.  Default standard parallel is  the  equator.   For
              map  height,  max  dimension,  or  min  dimension,  append h, +, or - to the width,
              More details can be found in the psbasemap man pages.


              -Jclon0/lat0/scale (Cassini)
              -Jcyl_stere/[lon0/[lat0/]]scale (Cylindrical Stereographic)
              -Jj[lon0/]scale (Miller)
              -Jm[lon0/[lat0/]]scale (Mercator)
              -Jmlon0/lat0/scale (Mercator - Give meridian and standard parallel)
              -Jo[a]lon0/lat0/azimuth/scale (Oblique Mercator - point and azimuth)
              -Jo[b]lon0/lat0/lon1/lat1/scale (Oblique Mercator - two points)
              -Joclon0/lat0/lonp/latp/scale (Oblique Mercator - point and pole)
              -Jq[lon0/[lat0/]]scale (Cylindrical Equidistant)
              -Jtlon0/[lat0/]scale (TM - Transverse Mercator)
              -Juzone/scale (UTM - Universal Transverse Mercator)
              -Jy[lon0/[lat0/]]scale (Cylindrical Equal-Area)

              CONIC PROJECTIONS:

              -Jblon0/lat0/lat1/lat2/scale (Albers)
              -Jdlon0/lat0/lat1/lat2/scale (Conic Equidistant)
              -Jllon0/lat0/lat1/lat2/scale (Lambert Conic Conformal)
              -Jpoly/[lon0/[lat0/]]scale ((American) Polyconic)


              -Jalon0/lat0[/horizon]/scale (Lambert Azimuthal Equal-Area)
              -Jelon0/lat0[/horizon]/scale (Azimuthal Equidistant)
              -Jflon0/lat0[/horizon]/scale (Gnomonic)
              -Jglon0/lat0[/horizon]/scale (Orthographic)
              -Jglon0/lat0/altitude/azimuth/tilt/twist/Width/Height/scale (General Perspective).
              -Jslon0/lat0[/horizon]/scale (General Stereographic)


              -Jh[lon0/]scale (Hammer)
              -Ji[lon0/]scale (Sinusoidal)
              -Jkf[lon0/]scale (Eckert IV)
              -Jk[s][lon0/]scale (Eckert VI)
              -Jn[lon0/]scale (Robinson)
              -Jr[lon0/]scale (Winkel Tripel)
              -Jv[lon0/]scale (Van der Grinten)
              -Jw[lon0/]scale (Mollweide)


              -Jp[a]scale[/origin][r|z] (Polar coordinates (theta,r))
              -Jxx-scale[d|l|ppow|t|T][/y-scale[d|l|ppow|t|T]] (Linear, log, and power scaling)

       -R     west, east, south, and north specify the Region of interest, and  you  may  specify
              them  in  decimal  degrees  or  in [+-]dd:mm[][W|E|S|N] format.  Append r if
              lower left and upper right map coordinates are given instead of w/e/s/n.   The  two
              shorthands  -Rg  and  -Rd stand for global domain (0/360 and -180/+180 in longitude
              respectively, with -90/+90 in latitude). Alternatively,  specify  the  name  of  an
              existing grid file and the -R settings (and grid spacing, if applicable) are copied
              from the grid.


       No space between the option flag and the associated arguments.

       -A     Append c to annotate using the MGD77 cruise ID [Default uses the filename  prefix].
              Optional size is the font size in points.  The leg annotation font is controlled by
              LABEL_FONT.  By default, each leg is annotated every time it enters the map region.
              Alternatively,  append ,spacing to place this label every spacing units apart along
              the track.  Append one of the units k (km),  n  (nautical  mile),  d  (day),  or  h

       -B     Sets map boundary annotation and tickmark intervals; see the psbasemap man page for
              all the details.

       -C     Select procedure for along-track distance calculation:
                   f Flat Earth distances.
                   g Great circle distances [Default].
                   e Geodesic distances on current GMT ellipsoid.

       -Da    Do not plot data collected before startdate  (yyyy-mm-ddT[hh:mm:ss])   [Default  is
              first day].

       -Db    Do not plot data collected after stopdate (yyyy-mm-ddT[hh:mm:ss]). [Default is last

       -F     Do not apply the error bit flags if present in a MGD77+ file  [Default  will  apply
              these flags upon reading the data].

       -G     Let  successive  point separations exceeding dgap (km) or tgap (minutes) indicate a
              break in the track where we should not draw a line [no gaps recognized].  Repeat to
              use both types of gap checking.

       -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].

       -K     More PostScript code will be appended later [Default terminates the plot system].

       -L     To put time/distance log-marks on the track.  E.g.  a500ka24ht6h  means  (a)nnotate
              every  500  km  (k)  and  24  h(ours),  with  (t)ickmarks every 500 km and 6 hours.
              Alternatively you may use the modifiers d (days) and n (nautical miles).

       -O     Selects Overlay plot mode [Default initializes a new plot system].

       -P     Selects Portrait plotting mode [Default is Landscape,  see  gmtdefaults  to  change

       -Sa    Do  not  plot  data  that  are  less  than startdist meter along track from port of
              departure.  Append k for km, m for miles, or n for nautical  miles  [Default  is  0

       -Sb    Do  not  plot  data  that  are  more  than  stopdist meter along track from port of
              departure.  Append k for km, m for miles, or n for nautical miles [Default  is  end
              of track].

       -T     Controls  the attributes of the three kinds of markers (T for the first time marker
              in a new day, t for additional time markers in the same day,  and  d  for  distance
              markers).   For  each  of  these  you  can specify the 5 comma-separated attributes
              markersize, markercolor, markerfontsize, markerfont, and  markerfontcolor.   Repeat
              the -T option for each marker type.

       -U     Draw  Unix  System time stamp on plot.  By adding just/dx/dy/, the user may specify
              the justification of the stamp and where the stamp should fall on the page relative
              to  lower  left  corner of the plot.  For example, BL/0/0 will align the lower left
              corner of the time stamp with the lower  left  corner  of  the  plot.   Optionally,
              append  a  label,  or  c (which will plot the command string.).  The GMT parameters
              UNIX_TIME, UNIX_TIME_POS, and UNIX_TIME_FORMAT can affect the appearance;  see  the
              gmtdefaults man page for details.  The time string will be in the locale set by the
              environment variable TZ (generally local time).

       -W     Append pen used for the trackline. [Default is 0.25p,black].  [Default is solid].

       -X -Y  Shift  plot  origin  relative  to  the  current  origin  by  (x-shift,y-shift)  and
              optionally  append  the  length  unit (c, i, m, p).  You can prepend a to shift the
              origin back to the original position after plotting, or  prepend   r  [Default]  to
              reset  the  current origin to the new location.  If -O is used then the default (x-
              shift,y-shift)  is  (0,0),  otherwise  it  is  (r1i,  r1i)   or   (r2.5c,   r2.5c).
              Alternatively,  give c to align the center coordinate (x or y) of the plot with the
              center of the page based on current page size.

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

       -c     Specifies the number of plot copies. [Default is 1].


       To  generate  a  Mercator plot of the track of the cruise 01010007 in the area 70W to 20E,
       40S to 20N, using a Mercator scale of 0.1inch/degree, label  the  tracks  with  10  points
       characters,  annotate the boundaries every 10 degrees, draw gridlines every 5 degrees, and
       mark the track every day and 1000 km, with ticks every 6 hours and 250 km,  and  send  the
       plot to the default printer, enter the following command:

       mgd77track 01010007 -R 70W/20E/40S/20N -Jm 0.1 -B 10g5 -A 10 -L a1da1000kf6hf250k | lpr


       mgd77info(1), psbasemap(1) mgd77list(1)


       Wessel,  P.,  and  W.  H.  F.  Smith, 2013, The Generic Mapping Tools (GMT) version 4.5.11
       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,, Copyright 1995 by the 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.
       The     Marine     Geophysical     Data     Exchange     Format     -     "MGD77",     see