psxyz(1) GMT psxyz(1)
NAME
psxyz - Plot lines, polygons, and symbols in 3-D
SYNOPSIS
psxyz [ table ] -Jparameters
-Jz|Zparameters
-Rwest/east/south/north[/zmin/zmax][+r] [ -B[p|s]parameters ] [
-Ddx/dy[/dz] ] [ -Gfill ] [ -Iintens ] [ -K ] [
-L[+b|d|D][+xl|r|x0][+yl|r|y0][+ppen] ] [ -N ] [ -O ] [ -P ] [ -Q ]
[ -S[symbol][size[unit]][/size_y] ] [ -T ] [ -U[stamp] ] [
-V[level] ] [ -W[pen][attr] ] [ -Xx_offset ] [ -Yy_offset ] [
-aflags ] [ -bibinary ] [ -dinodata ] [ -eregexp ] [ -fflags ] [ -ggaps
] [ -hheaders ] [ -iflags ] [ -pflags ] [ -ttransp ] [ -:[i|o] ]
Note: No space is allowed between the option flag and the associated
arguments.
DESCRIPTION
psxyz reads (x,y,z) triplets from files [or standard input] and gener-
ates PostScript code that will plot lines, polygons, or symbols at
those locations in 3-D. If a symbol is selected and no symbol size
given, then psxyz will interpret the fourth 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. If -S is not used, a line connecting the data
points will be drawn instead. To explicitly close polygons, use -L.
Select a fill with -G. If -G is set, -W will control whether the poly-
gon outline is drawn or not. If a symbol is selected, -G and -W deter-
mines the fill and outline/no outline, respectively. The PostScript
code is written to standard output.
REQUIRED ARGUMENTS
-Jparameters (more a|)
Select map projection.
-Jz|Zparameters (more a|)
Set z-axis scaling; same syntax as -Jx.
-Rxmin/xmax/ymin/ymax[+r][+uunit] (more a|)
Specify the region of interest.
For perspective view p, optionally append /zmin/zmax. (more a|)
OPTIONAL ARGUMENTS
table One or more ASCII (or binary, see -bi[ncols][type]) data table
file(s) holding a number of data columns. If no tables are given
then we read from standard input.
-B[p|s]parameters (more a|)
Set map boundary frame and axes attributes.
-Ccpt Give a CPT or specify -Ccolor1,color2[,color3,a|] to build a
linear continuous CPT from those colors automatically. In this
case colorn can be a r/g/b triplet, a color name, or an HTML
hexadecimal color (e.g. #aabbcc ). If -S is set, let symbol
fill color be determined by the t-value in the fourth column.
Additional fields are shifted over by one column (optional size
would be in 5th rather than 4th field, etc.). If -S is not set,
then psxyz expects the user to supply a multisegment file (where
each segment header contains a -Zval string. The val will con-
trol the color of the line or polygon (if -L is set) via the
CPT.
-Ddx/dy[/dz]
Offset the plot symbol or line locations by the given amounts
dx/dy[dz] [Default is no offset].
-Gfill Select color or pattern for filling of symbols or polygons
[Default is no fill]. Note that psxyz will search for -G and -W
strings in all the segment headers and let any values thus found
over-ride the command line settings.
-Iintens
Use the supplied intens value (nominally in the -1 to + 1 range)
to modulate the fill color by simulating illumination [none].
-K (more a|)
Do not finalize the PostScript plot.
-L[+b|d|D][+xl|r|x0][+yl|r|y0][+ppen]
Force closed polygons. Alternatively, append modifiers to build
a polygon from a line segment. Append +d to build symmetrical
envelope around y(x) using deviations dy(x) given in extra col-
umn 4. Append +D to build asymmetrical envelope around y(x)
using deviations dy1(x) and dy2(x) from extra columns 4-5.
Append +b to build asymmetrical envelope around y(x) using
bounds yl(x) and yh(x) from extra columns 4-5. Append +xl|r|x0
to connect first and last point to anchor points at either xmin,
xmax, or x0, or append +yb|t|y0 to connect first and last point
to anchor points at either ymin, ymax, or y0. Polygon may be
painted (-G) and optionally outlined by adding +ppen [no out-
line]. All constructed polygons are assumed to have a constant
z value.
-N[c|r]
Do NOT clip symbols that fall outside map border [Default plots
points whose coordinates are strictly inside the map border
only]. The option does not apply to lines and polygons which are
always clipped to the map region. For periodic (360-longitude)
maps we must plot all symbols twice in case they are clipped by
the repeating boundary. The -N will turn off clipping and not
plot repeating symbols. Use -Nr to turn off clipping but retain
the plotting of such repeating symbols, or use -Nc to retain
clipping but turn off plotting of repeating symbols.
-O (more a|)
Append to existing PostScript plot.
-P (more a|)
Select aPortraita plot orientation.
-Q Turn off the automatic sorting of items based on their distance
from the viewer. The default is to sort the items so that items
in the foreground are plotted after items in the background.
-S[symbol][size[u]][/size_y]
Plot symbols. If present, size is symbol size in the unit set in
gmt.conf (unless c, i, or p is appended). If the symbol code
(see below) is not given it will be read from the last column in
the input data; this cannot be used in conjunction with binary
input. Optionally, append c, i, or p to indicate that the size
information in the input data is in units of cm, inch, or point,
respectively [Default is PROJ_LENGTH_UNIT]. Note: if you give
both size and symbol via the input file you must use
PROJ_LENGTH_UNIT to indicate the units used for the symbol size
or append the units to the size in the file. Some 2-dimensional
symbols optionally take a second size via size_y. If symbol
sizes are expected via the fourth data column then you may con-
vert those values to suitable symbol sizes via the -i mechanism.
The uppercase symbols A, C, D, G, H, I, N, S, T are normalized
to have the same area as a circle with diameter size, while the
size of the corresponding lowercase symbols refers to the diame-
ter of a circumscribed circle.
You can change symbols by adding the required -S option to any
of your multisegment headers.
Choose between these symbol codes:
-S- x-dash (-). size is the length of a short horizontal
(x-dir) line segment.
-S+ plus (+). size is diameter of circumscribing circle.
-Sa star. size is diameter of circumscribing circle.
-Sb Vertical 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 = ymin. Append b[base] to
change this value. If base is not appended then we read
it from the last input data column.
-SB Horizontal bar extending from base to x. size is bar
width. Append u if size is in y-units [Default is
plot-distance units]. By default, base = xmin. Append
b[base] to change this value. If base is not appended
then we read it from the last input data column.
-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 4, 5, and 6.
-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 geographical instead of
plot-distance units. An exception occurs for a linear
projection in which we assume the ellipse axes are given
in the same units as -R. For degenerate ellipses (cir-
cles) with just the diameter given, use -SE-. The diame-
ter is excepted to be given in column 4. Alternatively,
append the desired diameter to -SE- and this fixed diame-
ter is used instead. For allowable geographical units,
see UNITS.
-Sf front. -Sfgap[/size][+l|+r][+b+c+f+s+t][+ooff-
set][+p[pen]]. 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. If
size is missing it is set to 30% of the gap, except when
gap is negative and size is thus required. Append +l or
+r to plot symbols on the left or right side of the front
[Default is centered]. Append +type to specify which sym-
bol to plot: box, circle, fault, slip, or triangle.
[Default is fault]. Slip means left-lateral or right-lat-
eral strike-slip arrows (centered is not an option). The
+s modifier optionally accepts the angle used to draw the
vector [30]. Append +ooffset to offset the first symbol
from the beginning of the front by that amount [0]. The
chosen symbol is drawn with the same pen as set for the
line (i.e., via -W). The use an alternate pen, append
+ppen. To skip the outline, just use +p. Note: By plac-
ing -Sf options in the segment header you can change the
front types on a segment-by-segment basis.
-Sg octagon. size is diameter of circumscribing circle.
-Sh hexagon. size is diameter of circumscribing circle.
-Si inverted triangle. size is diameter of circumscribing
circle.
-Sj Rotated rectangle. Direction (in degrees counter-clock-
wise from horizontal), x-dimension, and y-dimension must
be found in columns 4, 5, and 6.
-SJ Same as -Sj, 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
(-Sj leaves the directions unchanged.) Furthermore, the
dimensions must be given in geographical instead of
plot-distance units. For a degenerate rectangle (square)
with one dimension given, use -SJ-. The dimension is
excepted to be given in column 4. Alternatively, append
the dimension diameter to -SJ- and this fixed dimension
is used instead. An exception occurs for a linear pro-
jection in which we assume the dimensions are given in
the same units as -R. For allowable geographical units,
see UNITS.
-Sk kustom symbol. Append <name>/size, and we will look for a
definition file called <name>.def in (1) the current
directory or (2) in ~/.gmt or (3) in $GMT_SHAREDIR/cus-
tom. The symbol as defined in that file is of size 1.0 by
default; the appended size will scale symbol accordingly.
The symbols are plotted in the x-y plane. Users may add
their own custom *.def files; see CUSTOM SYMBOLS below.
-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 FONT_ANNOT_PRIMARY].
-Sm math angle arc, optionally with one or two arrow heads
[Default is no arrow heads]. The size is the length of
the vector head. Arc width is set by -W. The radius of
the arc and its start and stop directions (in degrees
counter-clockwise from horizontal) must be given in col-
umns 4-6. See VECTOR ATTRIBUTES for specifying
attributes.
-SM Same as -Sm but switches to straight angle symbol if
angles subtend 90 degrees exactly.
-Sn pentagon. size is diameter of circumscribing circle.
-So column (3-D) extending from base to z. The size sets
base width (Use xsize/ysize if not the same). Append u
if size is in x-units [Default is plot-distance units].
If no size is given we expect both xsize and ysize as two
extra data columns. By default, base = 0. Append bbase
to change this value. The facet colors will be modified
to simulate shading. Use -SO to disable such 3-D illumi-
nation. If base is not appended then we read it from the
last input data column.
-Sp point. No size needs to be specified (1 pixel is used).
-Sq quoted line, i.e., lines with annotations such as con-
tours. It is assumed that each individual line has a
constant z level (i.e., each line must lie in the x-y
plane). Append [d|D|f|l|L|n|x|X]info[:labelinfo]. The
required argument controls the placement of labels along
the quoted lines. Choose among five controlling algo-
rithms:
ddist[c|i|p] or Ddist[d|e|f|k|m|M|n|s] For lower case
d, give distances between labels on the plot in your
preferred measurement unit c (cm), i (inch), or p
(points), while for upper case D, specify distances in
map units and append the unit; choose among e (m), f
(foot), k (km), M (mile), n (nautical mile) or u (US
survey foot), and d (arc degree), m (arc minute), or s
(arc second). [Default is 10c or 4i]. As an option,
you can append /fraction which is used to place the
very first label for each contour when the cumulative
along-contour distance equals fraction * dist [0.25].
fffile.d Reads the ASCII file ffile.d and places
labels at locations in the file that matches locations
along the quoted lines. Inexact matches and points
outside the region are skipped. l|Lline1[,*line2*,a|]
Give start and stop coordinates for one or more
comma-separated straight line segments. Labels will be
placed where these lines intersect the quoted lines.
The format of each line specification is start/stop,
where start and stop are either a specified point
lon/lat or a 2-character XY key that uses the justifi-
cation format employed in pstext to indicate a point
on the map, given as [LCR][BMT]. L will interpret the
point pairs as defining great circles [Default is
straight line]. nn_label Specifies the number of
equidistant labels for quoted lines line [1]. Upper
case N starts labeling exactly at the start of the
line [Default centers them along the line]. N-1 places
one justified label at start, while N+1 places one
justified label at the end of quoted lines. Option-
ally, append /min_dist[c|i|p] to enforce that a mini-
mum distance separation between successive labels is
enforced. x|Xxfile.d Reads the multisegment file
xfile.d and places labels at the intersections between
the quoted lines and the lines in xfile.d. X will
resample the lines first along great-circle arcs. In
addition, you may optionally append +rradius[c|i|p] to
set a minimum label separation in the x-y plane [no
limitation].
The optional labelinfo controls the specifics of the
label formatting and consists of a concatenated string
made up of any of the following control arguments:
+aangle
For annotations at a fixed angle, +an for
line-normal, or +ap for line-parallel
[Default].
+cdx[/dy]
Sets the clearance between label and optional
text box. Append c|i|p to specify the unit or %
to indicate a percentage of the label font size
[15%].
+d Turns on debug which will draw helper points
and lines to illustrate the workings of the
quoted line setup.
+e Delay the plotting of the text. This is used to
build a clip path based on the text, then lay
down other overlays while that clip path is in
effect, then turning of clipping with psclip
-Cs which finally plots the original text.
+ffont Sets the desired font [Default FONT_ANNOT_PRI-
MARY with its size changed to 9p].
+g[color]
Selects opaque text boxes [Default is transpar-
ent]; optionally specify the color [Default is
PS_PAGE_COLOR].
+jjust Sets label justification [Default is MC].
Ignored when -SqN|n+|-1 is used.
+llabel
Sets the constant label text.
+Lflag Sets the label text according to the specified
flag:
+Lh Take the label from the current segment
header (first scan for an embedded -Llabel
option, if not use the first word following the
segment flag). For multiple-word labels,
enclose entire label in double quotes. +Ld
Take the Cartesian plot distances along the
line as the label; append c|i|p as the unit
[Default is PROJ_LENGTH_UNIT]. +LD Calculate
actual map distances; append d|e|f|k|n|M|n|s as
the unit [Default is d(egrees), unless label
placement was based on map distances along the
lines in which case we use the same unit speci-
fied for that algorithm]. Requires a map pro-
jection to be used. +Lf Use text after the 2nd
column in the fixed label location file as the
label. Requires the fixed label location set-
ting. +Lx As +Lh but use the headers in the
xfile.d instead. Requires the crossing file
option.
+ndx[/dy]
Nudges the placement of labels by the specified
amount (append c|i|p to specify the units).
Increments are considered in the coordinate
system defined by the orientation of the line;
use +N to force increments in the plot x/y
coordinates system [no nudging]. Not allowed
with +v.
+o Selects rounded rectangular text box [Default
is rectangular]. Not applicable for curved
text (+v) and only makes sense for opaque text
boxes.
+p[pen]
Draws the outline of text boxes [Default is no
outline]; optionally specify pen for outline
[Default is width = 0.25p, color = black, style
= solid].
+rmin_rad
Will not place labels where the lineas radius
of curvature is less than min_rad [Default is
0].
+t[file]
Saves line label x, y, and text to file
[Line_labels.txt]. Use +T to save x, y, angle,
text instead.
+uunit Appends unit to all line labels. If unit starts
with a leading hyphen (-) then there will be no
space between label value and the unit.
[Default is no unit].
+v Specifies curved labels following the path
[Default is straight labels].
+w Specifies how many (x,y) points will be used to
estimate label angles [Default is 10].
+=prefix
Prepends prefix to all line labels. If prefix
starts with a leading hyphen (-) then there
will be no space between label value and the
prefix. [Default is no prefix].
Note: By placing -Sq options in the segment header you
can change the quoted text attributes on a seg-
ment-by-segment basis.
-Sr rectangle. No size needs to be specified, but the x- and
y-dimensions must be found in columns 4 and 5.
-SR Rounded rectangle. No size needs to be specified, but the
x- and y-dimensions and corner radius must be found in
columns 4, 5, and 6.
-Ss square. size is diameter of circumscribing circle.
-St triangle. size is diameter of circumscribing circle.
-Su cube (3-D). The size) sets length of all sides. Append u
if size is in x-units [Default is plot-distance units].
The facet colors will be modified to simulate shading.
Use -SU to disable such 3-D illumination.
-Sv vector. Direction (in degrees counter-clockwise from hor-
izontal) and length must be found in columns 4 and 5, and
size, if not specified on the command-line, should be
present in column 6. The size is the length of the vec-
tor head. Vector width is set by -W. See VECTOR
ATTRIBUTES for specifying attributes.
-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.) See VECTOR
ATTRIBUTES for specifying attributes.
-Sw pie wedge. Start and stop directions (in degrees
counter-clockwise from horizontal) for pie slice must be
found in columns 4 and 5. Append +a to just draw the arc
line or +r to just draw the radial lines.
-SW Same as -Sw, except azimuths (in degrees east of north)
should be given instead of the two directions. The
azimuths will be mapped into angles based on the chosen
map projection (-Sw leaves the directions unchanged.)
For geo-wedges, specify size as a radial distance and
append a length unit from d|m|s|e|f|k|M|n|u. Append +a
to just draw the arc or +r to just draw the radial lines.
-Sx cross (x). size is diameter of circumscribing circle.
-Sy y-dash (|). size is the length of a short horizontal
(y-dir) line segment.
-S= geovector. Azimuth (in degrees east from north) and
length (in km) must be found in columns 4 and 5. The size
is the length of the vector head. Vector width is set by
-W. See VECTOR ATTRIBUTES for specifying attributes.
Note: Geovector stems are drawn as thin filled polygons
and hence pen attributes like dashed and dotted are not
available.
-S~ decorated line, i.e., lines with symbols along them.
Append [d|D|f|l|L|n|N|s|S|x|X]info[:symbolinfo]. The
required argument controls the placement of symbols along
the decorated lines. Choose among six controlling algo-
rithms:
ddist[c|i|p] or Ddist[d|e|f|k|m|M|n|s]
For lower case d, give distances between sym-
bols on the plot in your preferred measurement
unit c (cm), i (inch), or p (points), while for
upper case D, specify distances in map units
and append the unit; choose among e (m), f
(foot), k (km), M (mile), n (nautical mile) or
u (US survey foot), and d (arc degree), m (arc
minute), or s (arc second). [Default is 10c or
4i]. As an option, you can append /fraction
which is used to place the very first symbol
for each line when the cumulative along-line
distance equals fraction * dist [0.25].
fffile.d
Reads the ASCII file ffile.d and places symbols
at locations in the file that matches locations
along the decorated lines. Inexact matches and
points outside the region are skipped.
l|Lline1[,line2,a|]
Give the coordinates of the end points for one
or more comma-separated straight line segments.
Symbols will be placed where these lines inter-
sect the decorated lines. The format of each
line specification is
start_lon/start_lat/stop_lon/stop_lat. Both
start_lon/start_lat and stop_lon/stop_lat can
be replaced by a 2-character key that uses the
justification format employed in pstext to
indicate a point on the frame or center of the
map, given as [LCR][BMT]. L will interpret the
point pairs as defining great circles [Default
is straight line].
n|Nn_symbol
Specifies the number of equidistant symbols for
decorated lines [1]. Upper case N starts plac-
ing symbols exactly at the start of the line
[Default centers them along the line]. N-1
places one symbol at start, while N+1 places
one symbol at the end of decorated lines.
Optionally, append /min_dist[c|i|p] to enforce
that a minimum distance separation between suc-
cessive symbols is enforced.
s|Sn_symbol
Same as n|Nn_symbol but implies that the input
data are first to be converted into a series of
2-point line segments before plotting.
x|Xxfile.d
Reads the multisegment file xfile.d and places
symbols at the intersections between the deco-
rated lines and the lines in xfile.d. X will
resample the lines first along great-circle
arcs.
The optional symbolinfo controls the specifics of the
symbol selection and formatting and consists of a con-
catenated string made up of any of the following con-
trol arguments:
+aangle
For symbols at a fixed angle, +an for line-nor-
mal, or +ap for line-parallel [Default].
+d Turns on debug which will draw helper points
and lines to illustrate the workings of the
decorated line setup.
+g[fill]
Sets the symbol fill [no fill].
+ndx[/dy]
Nudges the placement of symbols by the speci-
fied amount (append c|i|p to specify the
units). Increments are considered in the coor-
dinate system defined by the orientation of the
line; use +N to force increments in the plot
x/y coordinates system [no nudging].
+p[pen]
Draws the outline of symbols [Default is no
outline]; optionally specify pen for outline
[Default is width = 0.25p, color = black, style
= solid].
+w Specifies how many (x,y) points will be used to
estimate symbol angles [Default is 10].
Note: By placing -S~ options in the segment header you
can change the decorated lines on a segment-by-segment
basis.
-T Ignore all input files, including standard input. This is the
same as specifying /dev/null (or NUL for Windows users) as input
file. Use this to activate only the options that are not
related to plotting of lines or symbols, such as psxyz -R -J -O
-T to terminate a sequence of GMT plotting commands without pro-
ducing any plotting output.
-U[[just]/dx/dy/][c|label] (more a|)
Draw GMT time stamp logo on plot.
-V[level] (more a|)
Select verbosity level [c].
-W[pen][attr] (more a|)
Set pen attributes for lines or the outline of symbols
[Defaults: width = default, color = black, style = solid]. If
the modifier +cl is appended then the color of the line are
taken from the CPT (see -C). If instead modifier +cf is appended
then the color from the cpt file is applied to symbol fill. Use
just +c for both effects.
-X[a|c|f|r][x-shift[u]]
-Y[a|c|f|r][y-shift[u]] (more a|)
Shift plot origin.
-acol=name[^<i>a|] (more a|)
Set aspatial column associations col=name.
-bi[ncols][t] (more a|)
Select native binary input. [Default is the required number of
columns given the chosen settings].
-dinodata (more a|)
Replace input columns that equal nodata with NaN.
-e[~]^<i>apattern^<i>a | -e[~]/regexp/[i] (more a|)
Only accept data records that match the given pattern.
-f[i|o]colinfo (more a|)
Specify data types of input and/or output columns.
-g[a]x|y|d|X|Y|D|[col]z[+|-]gap[u] (more a|)
Determine data gaps and line breaks. The -g option is ignored if
-S is set.
-h[i|o][n][+c][+d][+rremark][+rtitle] (more a|)
Skip or produce header record(s).
-icols[+l][+sscale][+ooffset][,^<i>a|] (more a|)
Select input columns and transformations (0 is first column).
-p[x|y|z]azim[/elev[/zlevel]][+wlon0/lat0[/z0]][+vx0/y0] (more a|)
Select perspective view.
-t[transp] (more a|)
Set PDF transparency level in percent.
-:[i|o] (more a|)
Swap 1st and 2nd column on input and/or output.
-^ or just -
Print a short message about the syntax of the command, then
exits (NOTE: on Windows just use -).
-+ or just +
Print an extensive usage (help) message, including the explana-
tion of any module-specific option (but not the GMT common
options), then exits.
-? or no arguments
Print a complete usage (help) message, including the explanation
of all options, then exits.
UNITS
For map distance unit, append unit d for arc degree, m for arc minute,
and s for arc second, or e for meter [Default], f for foot, k for km, M
for statute mile, n for nautical mile, and u for US survey foot. By
default we compute such distances using a spherical approximation with
great circles. Prepend - to a distance (or the unit is no distance is
given) to perform aFlat Eartha calculations (quicker but less accurate)
or prepend + to perform exact geodesic calculations (slower but more
accurate).
VECTOR ATTRIBUTES
Several modifiers may be appended to the vector-producing options to
specify the placement of vector heads, their shapes, and the justifica-
tion of the vector. Below, left and right refers to the side of the
vector line when viewed from the start point to the end point of the
segment:
+aangle sets the angle of the vector head apex [30].
+b places a vector head at the beginning of the vector path [none].
Optionally, append t for a terminal line, c for a circle, a for
arrow [Default], i for tail, A for plain arrow, and I for plain
tail. Further append l|r to only draw the left or right side of
this head [both sides].
+e places a vector head at the end of the vector path [none].
Optionally, append t for a terminal line, c for a circle, a for
arrow [Default], i for tail, A for plain arrow, and I for plain
tail. Further append l|r to only draw the left or right side of
this head [both sides].
+g-|fill turns off vector head fill (if -) or sets the vector head
fill [Default fill is used, which may be no fill].
+hshape sets the shape of the vector head (range -2/2). Default is
controlled by MAP_VECTOR_SHAPE [0].
+l draws half-arrows, using only the left side of specified heads
[both sides].
+m places a vector head at the mid-point the vector path [none].
Append f or r for forward or reverse direction of the vector [for-
ward]. Optionally, append t for a terminal line, c for a circle, or
a for arrow head [Default]. Further append l|r to only draw the
left or right side of this head [both sides]. Cannot be combined
with +b or +e.
+nnorm scales down vector attributes (pen thickness, head size) with
decreasing length, where vectors shorter than norm will have their
attributes scaled by length/norm [arrow attributes remains invariant
to length].
+oplon/plat specifies the oblique pole for the great or small cir-
cles. Only needed for great circles if +q is given.
+p[-][pen] sets the vector pen attributes. If pen has a leading -
then the head outline is not drawn. [Default pen is used, and head
outline is drawn]
+q means the input angle, length data instead represent the start
and stop opening angles of the arc segment relative to the given
point.
+r draws half-arrows, using only the right side of specified heads
[both sides].
+t[b|e]trim will shift the beginning or end point (or both) along
the vector segment by the given trim; append suitable unit. If the
modifiers b|e are not used then trim may be two values separated by
a slash, which is used to specify different trims for the two ends.
Positive trims will shorted the vector while negative trims will
lengthen it [no trim].
In addition, all but circular vectors may take these modifiers:
+jjust determines how the input x,y point relates to the vector.
Choose from beginning [default], end, or center.
+s means the input angle, length are instead the x, y coordinates of
the vector end point.
Finally, Cartesian vectors may take these modifiers:
+zscale[unit] expects input dx,dy vector components and uses the
scale to convert to polar coordinates with length in given unit.
EXAMPLES
To plot blue columns (width = 1.25 cm) at the positions listed in the
file heights.xyz on a 3-D projection of the space (0-10), (0-10),
(0-100), with tickmarks every 2, 2, and 10, viewing it from the south-
east at 30 degree elevation, use:
gmt psxyz heights.xyz -R0/10/0/10/0/100 -Jx1.25c -Jz0.125c -So1.25c \
-Gblue -Bx2+lXLABEL -By2+lYLABEL -Bz10+lZLABEL -B+t"3-D PLOT" -p135/30 \
-Uc -W -P > heights.ps
SEGMENT HEADER PARSING
Segment header records may contain one of more of the following
options:
-Gfill Use the new fill and turn filling on
-G- Turn filling off
-G Revert to default fill (none if not set on command line)
-Wpen Use the new pen and turn outline on
-W Revert to default pen MAP_DEFAULT_PEN (if not set on command
line)
-W- Turn outline off
-Zzval Obtain fill via cpt lookup using z-value zval
-ZNaN Get the NaN color from the CPT
CUSTOM SYMBOLS
psxyz allows users to define and plot their own custom symbols. This is
done by encoding the symbol using our custom symbol macro code
described in Appendix N. Put all the macro codes for your new symbol in
a file whose extension must be .def; you may then address the symbol
without giving the extension (e.g., the symbol file tsunami.def is used
by specifying -Sktsunami/size. The definition file can contain any num-
ber of plot code records, as well as blank lines and comment lines
(starting with #). psxyz will look for the definition files in (1) the
current directory, (2) the ~/.gmt directory, and (3) the
$GMT_SHAREDIR/custom directory, in that order. Freeform polygons (made
up of straight line segments and arcs of circles) can be designed -
these polygons can be painted and filled with a pattern. Other standard
geometric symbols can also be used. See Appendix App-custom_symbols for
macro definitions.
BUGS
No hidden line removal is employed for polygons and lines. Symbols,
however, are first sorted according to their distance from the view-
point so that nearby symbols will overprint more distant ones should
they project to the same x,y position.
psxyz 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 origi-
nal polygon.
SEE ALSO
gmt(1), gmt.conf(5), gmtcolors(5), psbasemap(1), psxy(1)
COPYRIGHT
2017, P. Wessel, W. H. F. Smith, R. Scharroo, J. Luis, and F. Wobbe
5.4.2 Jun 24, 2017 psxyz(1)
gmt5 5.4.2 - Generated Thu Jun 29 16:05:22 CDT 2017