NAME
gmttrack - A shiptrack plotting program
SYNOPSIS
gmttrack leg-ids -Rwest/east/south/north -Jparameters [ -Btickinfo ] [
-Mtrackticks ] [ -Wpen[red/green/blue][OA] ] [ -A[size] ] [ -P ] [ -O ]
[ -K ] [ -U[dx/dy/][label] ] [ -Xx-shift ] [ -Yy-shift ] [ -ccopies ] [
-V ]
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. For map height, max dimension, or min
dimension, append h, +, or - to the width, respectively.
CYLINDRICAL PROJECTIONS:
-Jclon0/lat0/scale (Cassini)
-Jjlon0/scale (Miller)
-Jmscale (Mercator - Greenwich and Equator as origin)
-Jmlon0/lat0/scale (Mercator - Give meridian and standard paral-
lel)
-Joalon0/lat0/azimuth/scale (Oblique Mercator - point and
azimuth)
-Joblon0/lat0/lon1/lat1/scale (Oblique Mercator - two points)
-Joclon0/lat0/lonp/latp/scale (Oblique Mercator - point and
pole)
-Jqlon0/scale (Equidistant Cylindrical Projection (Plate Car-
ree))
-Jtlon0/scale (TM - Transverse Mercator, with Equator as y = 0)
-Jtlon0/lat0/scale (TM - Transverse Mercator, set origin)
-Juzone/scale (UTM - Universal Transverse Mercator)
-Jylon0/lats/scale (Basic Cylindrical Projection)
AZIMUTHAL PROJECTIONS:
-Jalon0/lat0/scale (Lambert).
-Jelon0/lat0/scale (Equidistant).
-Jflon0/lat0/horizon/scale (Gnomonic).
-Jglon0/lat0/scale (Orthographic).
-Jslon0/lat0/[slat/]scale (General Stereographic)
CONIC PROJECTIONS:
-Jblon0/lat0/lat1/lat2/scale (Albers)
-Jdlon0/lat0/lat1/lat2/scale (Equidistant)
NON-GEOGRAPHICAL PROJECTIONS:
-Jp[a]scale[/origin] (polar (theta,r) coordinates, optional a
for azimuths and offset theta [0])
-Jxx-scale[l|ppow][/y-scale[l|ppow]][d] (Linear, log, and power
scaling)
More details can be found in the psbasemap man pages.
-R xmin, xmax, ymin, and ymax specify the Region of interest. For
geographic regions, these limits correspond to west, east,
south, and north 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 wesn. The
two shorthands -Rg -Rd stand for global domain (0/360 or
-180/+180 in longitude respectively, with -90/+90 in latitude).
For calendar time coordinates you may either give relative time
(relative to the selected TIME_EPOCH and in the selected
TIME_UNIT; append t to -JX|x), or absolute time of the form
[date]T[clock] (append T to -JX|x). At least one of date and
clock must be present; the T is always required. The date string
must be of the form [-]yyyy[-mm[-dd]] (Gregorian calendar) or
yyyy[-Www[-d]] (ISO week calendar), while the clock string must
be of the form hh:mm:ss[.xxx]. The use of delimiters and their
type and positions must be as indicated (however, input/output
and plotting formats are flexible).
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 [GMT Default is Landscape, see
gmtdefaults to change this].
gmtdefaults man page for details.
-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 origin of plot by (x-shift,y-shift). Prepend a for abso-
lute coordinates; the default (r) will reset plot origin. Give
c to center plot using 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 -B1g30m -A10 | lpr
SEE ALSO
gmt(GMTMANSECTION), psbasemap(GMTMANSECTION)
REFERENCES
Wessel, P., and W. H. F. Smith, 2004, The Generic Mapping Tools (GMT)
version 4 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: 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.
GMT4.0 1 Oct 2004 GMTTRACK(GMTMANSECTION)
Man(1) output converted with
man2html