GMTTRACK(1) Generic Mapping Tools GMTTRACK(1)NAMEgmttrack - A shiptrack plotting program
SYNOPSISgmttrack leg-ids -Rwest/east/south/north[r] -Jparameters [
-B[p|s]parameters ] [ -Mtrackticks ] [ -Wpen[red/green/blue][OA] ] [
-A[size] ] [ -K ] [ -O ] [ -P ] [ -U[just/dx/dy/][c|label] ] [ -V ] [
-X[a|c|r][x-shift[u]] ] [ -Y[a|c|r][y-shift[u]] ] [ -ccopies ]
DESCRIPTIONgmttrack reads gmt 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.
leg-ids
Can be one or more gmtleg-names, like c2104 v3206 etc.
-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 dimen‐
sion, or min dimension, append h, +, or - to the width, respec‐
tively.
More details can be found in the psbasemap man pages.
CYLINDRICAL PROJECTIONS:
-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 paral‐
lel)
-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)
AZIMUTHAL PROJECTIONS:
-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)
MISCELLANEOUS PROJECTIONS:
-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)
NON-GEOGRAPHICAL PROJECTIONS:
-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[:ss.xxx][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.
OPTIONS
No space between the option flag and the associated arguments.
-B Sets map boundary annotation and tickmark intervals; see the
psbasemap man page for all the details.
-A Annotate each leg every time it enters the plot. Optional size
is character size in points.
-Da Do not plot data collected before startdate (mm/dd/yyyy/hh:mm)
[Default is first day].
-Db Do not plot data collected after stopdate (mm/dd/yyyy/hh:mm).
[Default is last day].
-K More PostScript code will be appended later [Default terminates
the plot system].
-M To put time/distance 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.
-O Selects Overlay plot mode [Default initializes a new plot sys‐
tem].
-P Selects Portrait plotting mode [Default is Landscape, see gmtde‐
faults to change this].
-Sa Do not plot data that are less than startdist km along track
from port of departure. [Default is 0].
-Sb Do not plot data that are more than stopdist km along track from
port of departure. [Default is length of track].
-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 pen is thickness of the trackline. [Default is 1]. Optionally,
specify the rgb combination to obtain a colored trackline
[Default is black]. Append o for dotted line, a for dashed.
[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 "silently"].
-c Specifies the number of plot copies. [Default is 1].
EXAMPLES
To generate a Mercator plot of the track of cruises C2610 and V1512 in
the area 150E to 154E, 18N to 23N, using a Mercator scale of
1.5inch/degree, label the tracks with 10 points characters, annotate
the boundaries every degree, and draw gridlines every 30 minutes, and
send the plot to the default printer, enter the following command:
gmttrack c2610 v1512 -R 150/154/18/23 -Jm 1.5 -B 1g30m -A10 | lpr
SEE ALSOGMT(1), psbasemap(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.
GMT 4.5.14 1 Nov 2015 GMTTRACK(1)
