NAME¶
gmttrack - A shiptrack plotting program
SYNOPSIS¶
gmttrack leg-ids
-Rwest/
east/
south/
north[
r]
-J parameters [
-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]] ] [
-c copies ]
DESCRIPTION¶
gmttrack 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 dimension, or min dimension,
append h, +, or - to the width, respectively.
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
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)
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
system].
- -P
- Selects Portrait plotting mode [Default is Landscape, see
gmtdefaults 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
-R150/154/18/23
-Jm1.5
-B1
g30
m -A10 | lpr
SEE ALSO¶
GMT(1),
psbasemap(1)
REFERENCES¶
Wessel, P., and W. H. F. Smith, 2011, The Generic Mapping Tools (GMT) version
4.5.7 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://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 Display Data,
EOS Trans., AGU, 72 (41), p. 441.