NAME¶
psxy - Plot lines, polygons, and symbols on maps
SYNOPSIS¶
psxy files -Jparameters
-Rwest/east/south/north[
r] [
-A ] [
-Btickinfo ] [
-Ccptfile ] [
-E[
x|y|X|Y][
cap][
/pen] ] [
-Gfill ]
[
-H[
nrec] ] [
-K ] [
-L ] [
-N ] [
-M[
flag] ] [
-O ] [
-P ] [
-S[
symbol][
size] ] [
-U[
/dx/dy/][
label] ] [
-V ] [
-W[
pen] ] [
-Xx-shift ] [
-Yy-shift
] [
-: ] [
-ccopies ] [
-bi[
s][
n] ]
DESCRIPTION¶
psxy reads (x,y) pairs from
files [or standard input] and
generates
PostScript code that will plot lines, polygons, or symbols at
those locations on a map. If a symbol is selected and no symbol size given,
then psxy will interpret the third column of the input data as symbol size.
Symbols whose size is <= 0 are skipped. If no symbols are specified then
the symbol code (see
-S below) must be present as last column in the
input. Multiple segment files may be plotted using the
-M option. If
-S is not selected, a line connecting the data points will be drawn
instead. To explicitly close polygons, use
-L. Select a shade with
-G. If
-G is set,
-W will control whether the polygon
outline is drawn or not. If a symbol is selected,
-G and
-W
determines the fill color and outline/no outline, respectively. The
PostScript code is written to standard output.
- files
- List one or more file-names. If no files are given, psxy will read
standard input.
- -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 .gmtdefaults, but this can be overridden on the
command line by appending the c, i, or m to the scale/width value.
CYLINDRICAL PROJECTIONS:
-Jclon0/lat0/scale (Cassini)
-Jjlon0/scale (Miller)
-Jmscale (Mercator - Greenwich and Equator as origin)
-Jmlon0/lat0/scale (Mercator - Give meridian and standard
parallel)
-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
Carree))
-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)
-Jllon0/lat0/lat1/lat2/scale (Lambert)
MISCELLANEOUS PROJECTIONS:
-Jhlon0/scale (Hammer)
-Jilon0/scale (Sinusoidal)
-Jk[f|s]lon0/scale (Eckert IV (f) and VI (s))
-Jnlon0/scale (Robinson)
-Jrlon0/scale (Winkel Tripel)
-Jvlon0/scale (Van der Grinten)
-Jwlon0/scale (Mollweide)
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]]
(Linear, log, and power scaling)
More details can be found in the psbasemap manpages.
- -R
- west, east, south, and north specify the Region of interest.
To specify boundaries in degrees and minutes [and seconds], use the
dd:mm[:ss] format. Append r if lower left and upper right map
coordinates are given instead of wesn.
OPTIONS¶
No space between the option flag and the associated arguments.
- -A
- Suppress drawing line segments as great circle Arcs. [Default draws great
circle arcs.]
- -B
- Sets map boundary tickmark intervals. See psbasemap for
details.
- -C
- Give a color palette file. When used with -S, lets symbol color be
determined by the z-value in the third column. Additional fields are
shifted over by one column (optional size would be 4th rather than 3rd
field, etc.). If -S is not set, psxy expects the user to supply a
multisegment polygon file (requires -M) and will look for -Z val
strings in each multisegment header. The val will control the color
via the cpt file.
- -E
- Draw error bars. Append x and/or y to indicate which bars
you want to draw (Default is both x and y). The x and/or y errors must be
stored in the columns after the (x,y) pair [or (x,y,size) triplet]. The
cap parameter indicates the length of the end-cap on the error bars
[0.25c (or 0.1i)]. Pen attributes for error bars may also be set.
[Defaults: width = 1, color = 0/0/0, texture = solid]. If upper case
X and/or Y is used we will instead draw
"box-and-whisker" (or "stem-and-leaf") symbols. The x
(or y) coordinate is then taken as the median value, and 4 more columns
are expected to contain the minimum (0% quartile), the 25% quartile, the
75% quartile, and the maximum (100% quartile) values. The 25-75% box may
be filled by using -G.
- -G
- Select filling of polygons and symbols. Append the shade (0-255), color
(r/g/b), or P|pdpi/pattern (polygons only)
[Default is no fill]. Note when -M is chosen, psxy will
search for -G and -W strings in all the subheaders and let
any found values over-ride the command line settings.
- -H
- Input file(s) has Header record(s). Number of header records can be
changed by editing your .gmtdefaults file. If used, GMT default is
1 header record.
- -K
- More PostScript code will be appended later [Default terminates the
plot system].
- -L
- Force closed polygons: connect the endpoints of the line-segment(s) and
draw polygons.
- -M
- Multiple segment file. Segments are separated by a record whose first
character is flag. [Default is '>'].
- -N
- Do NOT skip symbols that fall outside map border [Default plots points
inside border only]. The option does not apply to lines and polygons which
are always clipped to the map region.
- -bo
- Selects binary output. Append s for single precision [Default is
double].
- -P
- Selects Portrait plotting mode [GMT Default is Landscape, see
gmtdefaults to change this].
- -S
- Plot symbols. If present, size is symbol size in the unit set in
.gmtdefaults (unless c, i, m, or p is
appended). The uppercase symbols A, C, D, H, I, S, T are normalized
to have the same area as the circle, while the corresponding lowercase
symbols all are circumscribed by the circle. Choose between these symbol
codes:
- -S
- Read symbol code (see below) from last column in the input data. Cannot be
used in conjunction with -b. Optionally, append c, i,
m, p to indicate that the size information in the input data
is in units of cm, inch, meter, or point, respectively. [Default is
MEASURE_UNIT].
- -Sa
- star. size is diameter of circumscribing circle.
- -Sb
- bar extending from base to y. size is bar width.
Append u if size is in x-units [Default is plot-distance
units]. By default, base = 0. Append bbase to change
this value.
- -Sc
- circle. size is diameter of circle.
- -Sd
- diamond. size is diameter of circumscribing circle.
- -Se
- ellipse. Direction (in degrees counter-clockwise from horizontal),
major_axis, and minor_axis must be found in columns 3, 4, and 5.
- -SE
- Same as -Se, except azimuth (in degrees east of north) should be
given instead of direction. The azimuth will be mapped into an angle based
on the chosen map projection ( -Se leaves the directions
unchanged.) Furthermore, the axes lengths must be given in km instead of
plot-distance units.
- -Sf
- front.
-Sfgap/size[dir][type][:offset]. Supply
distance gap between symbols and symbol size. If gap is negative,
it is interpreted to mean the number of symbols along the front instead.
Append dir to plot symbols on the left or right side
of the front [Default is centered]. Append type to specify which
symbol to plot: box, circle, fault, slip, or
triangle. [Default is fault]. Slip means left-lateral or
right-lateral strike-slip arrows (centered is not an option). Append :
offset to offset the first symbol from the beginning of the front
by that amount [Default is 0].
- -Sh
- hexagon. size is diameter of circumscribing circle.
- -Si
- inverted triangle. size is diameter of circumscribing
circle.
- -Sl
- letter or text string (less than 64 characters). Give size, and
append / string after the size. Note that the size is only
approximate; no individual scaling is done for different characters.
Remember to escape special characters like *. Optionally, you may append %
font to select a particular font [Default is ANOT_FONT].
- -Sp
- point. No size needs to be specified (1 pixel is used).
- -Ss
- square. size is diameter of circumscribing circle.
- -St
- triangle. size is diameter of circumscribing circle.
- -Sv
- vector. Direction (in degrees counter-clockwise from horizontal)
and length must be found in columns 3 and 4. size, if present, will
be interpreted as arrowwidth/headlength/headwidth [Default is 0.075
c/0.3 c/0.25c (or
0.03i/0.12i/0.1i)]. By default arrow attributes
remains invariant to the length of the arrow. To have the size of the
vector scale down with decreasing size, append nnorm, where
vectors shorter than norm will have their attributes scaled by
length/ norm.
- -SV
- Same as -Sv, except azimuth (in degrees east of north) should be
given instead of direction. The azimuth will be mapped into an angle based
on the chosen map projection ( -Sv leaves the directions
unchanged.)
- -Sw
- pie wedge. Start and stop directions (in degrees counter-clockwise
from horizontal) for pie slice must be found in columns 3 and 4.
- -Sx
- cross. size is diameter of circumscribing circle.
- -U
- Draw Unix System time stamp on plot. User may specify where the lower left
corner of the stamp should fall on the page relative to lower left corner
of plot. Optionally, append a label, or c (which will plot the
command string.). The GMT parameters UNIX_TIME and UNIX_TIME_POS can
affect the appearance; see the gmtdefaults man page for
details.
- -V
- Selects verbose mode, which will send progress reports to stderr [Default
runs "silently"].
- -W
- Set pen attributes. [Defaults: width = 1, color = 0/0/0, texture = solid].
Implicitly draws the outline of symbols with selected pen.
- -X -Y
- Shift origin of plot by (x-shift,y-shift). Prepend a for
absolute coordinates; the default ( r) will reset plot origin.
- -:
- Toggles between (longitude,latitude) and (latitude,longitude)
input/output. [Default is (longitude,latitude)]. Applies to geographic
coordinates only.
- -c
- Specifies the number of plot copies. [Default is 1]
- -bi
- Selects binary input. Append s for single precision [Default is
double]. Append n for the number of columns in the binary file(s).
[Default is the required number of columns given the chosen
settings].
EXAMPLES¶
To plot solid red circles (diameter = 0.25 cm) at the positions listed in the
file DSDP.xy on a Mercator map at 5 cm/degree of the area 150E to 154E, 18N to
23N, with tickmarks every 1 degree and gridlines every 15 minutes, try:
psxy DSDP.xy
-R150/154/18/23
-Jm5
c -Sc0.25
c
-G255/0/0
-B1
g15
m | lpr
To plot the xyz values in the file quakes.xyzm as circles with size given by the
magnitude in the 4th column and color based on the depth in the third using
the color palette cpt on a linear map, try
psxy quakes.xyzm
-R0/1000/0/1000
-JX6
i -Sc
-Ccpt
-B200 > map.ps
To plot the file trench.xy on a Mercator map, with white triangles with sides
0.25 inch on the left side of the line, spaced every 0.8 inch, use
psxy trench.xy
-R150/200/20/50
-Jm0.15
i
-Sf0.8
i/0.1
ilt -G255
-W -B10 | lpr br
To plot the data in the file misc.d as symbols determined by the code in the
last column, and with size given by the magnitude in the 4th column, and color
based on the third column via the color palette cpt on a linear map, try
psxy misc.d
-R0/100/-50/100
-JX6
i -S -Ccpt
-B20 > t.ps
BUGS¶
The
-N option does not adjust the BoundingBox information so you may have
to post-process the PostScript outout with epstool or ps2epsi to obtain a
correct BoundingBox.
psxy cannot handle filling of polygons that contain the south or north
pole. For such a polygon, make a copy and split it into two and make each
explicitly contain the polar point. The two polygons will combine to give the
desired effect when filled; to draw outline use the original polygon.
SEE ALSO¶
gmt(1gmt),
psbasemap(1gmt),
psxyz(1gmt)