Provided by: gmt-common_5.4.3+dfsg-1_all 
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 generates 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
polygon outline is drawn or not. If a symbol is selected, -G and -W determines the fill and outline/no
outline, respectively. The PostScript code is written to standard output.
REQUIRED ARGUMENTS
-Jparameters (more …)
Select map projection.
-Jz|Zparameters (more …)
Set z-axis scaling; same syntax as -Jx.
-Rxmin/xmax/ymin/ymax[+r][+uunit] (more …)
Specify the region of interest.
For perspective view p, optionally append /zmin/zmax. (more …)
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 …)
Set map boundary frame and axes attributes.
-Ccpt Give a CPT or specify -Ccolor1,color2[,color3,…] 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
control 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 …)
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 column
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
outline]. 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 …)
Append to existing PostScript plot.
-P (more …)
Select “Portrait” 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 convert 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 diameter
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 (circles) with just the diameter given, use -SE-. The diameter is excepted to be
given in column 4. Alternatively, append the desired diameter to -SE- and this fixed
diameter is used instead. For allowable geographical units, see UNITS.
-Sf front. -Sfgap[/size][+l|+r][+b+c+f+s+t][+ooffset][+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 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). 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 placing -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-clockwise 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 projection 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/custom. 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 columns 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 illumination. 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 contours. 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 algorithms:
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*,…] 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 justification
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. Optionally, append /min_dist[c|i|p] to enforce that a minimum
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_PRIMARY with its size changed to 9p].
+g[color]
Selects opaque text boxes [Default is transparent]; 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
specified for that algorithm]. Requires a map projection to be used. +Lf Use
text after the 2nd column in the fixed label location file as the label. Requires
the fixed label location setting. +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 line’s 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 segment-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 horizontal) 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 vector 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 algorithms:
ddist[c|i|p] or Ddist[d|e|f|k|m|M|n|s]
For lower case d, give distances between symbols 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,…]
Give the coordinates of the end points for one or more comma-separated straight
line segments. Symbols will be placed where these lines intersect 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 placing 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 successive 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 decorated 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 concatenated string made up of any of the following control arguments:
+aangle
For symbols at a fixed angle, +an for line-normal, 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 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].
+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 producing any plotting output.
-U[[just]/dx/dy/][c|label] (more …)
Draw GMT time stamp logo on plot.
-V[level] (more …)
Select verbosity level [c].
-W[pen][attr] (more …)
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 …)
Shift plot origin.
-acol=name[…] (more …)
Set aspatial column associations col=name.
-bi[ncols][t] (more …)
Select native binary input. [Default is the required number of columns given the chosen settings].
-dinodata (more …)
Replace input columns that equal nodata with NaN.
-e[~]”pattern” | -e[~]/regexp/[i] (more …)
Only accept data records that match the given pattern.
-f[i|o]colinfo (more …)
Specify data types of input and/or output columns.
-g[a]x|y|d|X|Y|D|[col]z[+|-]gap[u] (more …)
Determine data gaps and line breaks. The -g option is ignored if -S is set.
-h[i|o][n][+c][+d][+rremark][+rtitle] (more …)
Skip or produce header record(s).
-icols[+l][+sscale][+ooffset][,…] (more …)
Select input columns and transformations (0 is first column).
-p[x|y|z]azim[/elev[/zlevel]][+wlon0/lat0[/z0]][+vx0/y0] (more …)
Select perspective view.
-t[transp] (more …)
Set PDF transparency level in percent.
-:[i|o] (more …)
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 explanation 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 “Flat Earth” 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 justification 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 [forward]. 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 circles. 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
southeast 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
number 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 viewpoint 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 original polygon.
SEE ALSO
gmt, gmt.conf, gmtcolors, psbasemap, psxy
COPYRIGHT
2018, P. Wessel, W. H. F. Smith, R. Scharroo, J. Luis, and F. Wobbe