psxyz - Plot lines, polygons, and symbols in 3-D


      psxyz files -Jparameters -Rwest/east/south/north/zmin/zmax[r] [
      -Btickinfo ] [ -Ccptfile ] [ -Eazimuth/elevation ] [ -Gfill ] [
      -H[nrec] ] [ -K ] [ -L ] [ -M[flag] ] [ -N ] [ -O ] [ -P ] [
      -S[symbol][size] ] [ -U[/dx/dy/][label] ] [ -V ] [ -W[pen] ] [ -Xx-
      shift ] [ -Yy-shift ] [ -Zzlevel ] [ -: ] [ -ccopies ] [ -bi[s][n] ]


      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 in inch.  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 no
      symbols are selected, a line will be drawn.  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.

           List one or more file-names. If no files are given, psxyz will
           read standard input.

      -J   Selects the map projection. Scale is inch/degree, 1:xxxxx, or
           width in inch (upper case modifier).


           -Jclon0/lat0/scale (Cassini)
           -Jjlon0/scale (Miller)
           -Jmscale (Mercator - Greenwich and Equator as origin)
           -Jmlon0/lat0/scale (Mercator - Give meridian and standard
           -Joalon0/lat0/azimuth/scale (Oblique Mercator - point and
           -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)
           -Juzone/scale (UTM - Universal Transverse Mercator)
           -Jylon0/lats/scale (Basic Cylindrical Projection)


           -Jalon0/lat0/scale (Lambert).
           -Jelon0/lat0/scale (Equidistant).
           -Jflon0/lat0/horizon/scale (Gnomonic).
           -Jglon0/lat0/scale (Orthographic).
           -Jslon0/lat0/scale (General Stereographic)


           -Jblon0/lat0/lat1/lat2/scale (Albers)
           -Jllon0/lat0/lat1/lat2/scale (Lambert)


           -Jhlon0/scale (Hammer)
           -Jilon0/scale (Sinusoidal)
           -Jklon0/scale (Eckert VI)
           -Jnlon0/scale (Robinson)
           -Jrlon0/scale (Winkel Tripel)
           -Jwlon0/scale (Mollweide)


           -Jpscale (Linear projection for polar (theta,r) coordinates)
           -Jxx-scale[l|ppow][/y-scale[l|ppow]] (Linear, log, and power
           More details can be found in the psbasemap manpages.

      -Jz  Sets the vertical scaling (for 3-D maps).  Same syntax as -Jx.

      -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.


      No space between the option flag and the associated arguments.

      -B   Sets map boundary tickmark intervals. See psbasemap for details.

      -C   Give a color palette file and let symbol color be determined by
           the t-value in the fourth column.  Must be used with -S.  If
           used, then additional fields are shifted over by one column
           (optional size would be in 5th rather than 4th field, etc.).

      -E   Sets the viewpoint's azimuth and elevation [180/90].

      -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, psxyz 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: will connect the endpoints of the line-
           sement(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].

      -O   Selects Overlay plot mode [Default initializes a new plot

      -P   Selects Portrait plotting mode [GMT Default is Landscape, see
           gmtdefaults to change this].

      -S   Plot symbols.  size is symbol size in inch (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 a circle of given size, while
           the corresponding lowercase symbols are circumscribed by the
           circle.  Choose between:

      -Sa  star.  size is diameter of circumscribing circle.

      -Sb  (b)ar extending from base to y.  size is bar width.  Append u if
           size is in x-units [Default is inch]. By default, base = 0.
           Append bbase to change this value.

      -Sc  (c)ircle.  size is diameter of circle.

      -Sd  (d)iamond.  size is diameter of circumscribing circle.

      -Se  ellipse.  Direction (in degrees counterclockwise from
           horizontal), major_axis (in inch), and minor_axis (in inch) 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 km instead of inch.

      -Sf  fault.  Give distance gap between ticks and ticklength in inch.
           If gap is negative, it is interpreted to mean number of ticks
           instead.  Append l or r to draw tick on the left or right side of
           line [Default is centered].  Upper case L or R draws a triangle
           instead of line segment.

      -Sh  hexagon.  size is diameter of circumscribing circle.

      -Si  inverted triangle.  size is diameter of circumscribing circle.

      -Sl  letter or text string.  Give size in inch, 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 *.

      -So  c(o)lumn (3-D) extending from base to z.  size sets base width
           (Use xsize/ysize if not the same).  Append u if size is in x-
           units [Default is inch].  By default, base = 0.  Append bbase to
           change this value.

      -Sp  (p)oint.  No size needs to be specified.

      -Ss  (s)quare.  size is diameter of circumscribing circle.

      -St  (t)riangle.  size is diameter of circumscribing circle.

      -Su  c(u)be (3-D).  size sets length of all sides in inch. Append u if
           size is in x-units [Default is inch].

      -Sv  (v)ector.  Direction and length (in inch) must be found in
           columns 4 and 5.  size means arrowwidth/headlength/headwidth in
           (inch) [[Default is 0.03i/0.12i/0.1i inch].  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 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.)

      -Sx  (x)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 in inch [Default is (-0.75i/-
           0.75i)].  Optionally, append a label, or c (which will plot the
           command string.)

      -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 symbol with selected

      -X -Y
           Shift origin of plot by (x-shift,y-shift) inch  [Default is
           (a1i,a1i) for new plots, (0,0) for overlays].  Prepend a for
           absolute coordinates; the default (r) will reset plot origin.

      -Z   For 3-D projections:  Sets the z-level of the basemap [0].

      -:   Toggles between (longitude,latitude) and (latitude,longitude)
           input/output.  [Default is (longitude,latitude)].

      -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


      To plot blue columns (width = 0.5 inch) at the positions listed in the
      file 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, try:

      psxyz -R0/10/0/10/0/100 -Jx0.5i -Jz0.05i -So0.5i -G0/0/255
      -B2:XLABEL:/2:YLABEL:/10:ZLABEL::."3-D PLOT":15 -E135/30 -Uc -W -P >


      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.
      Header must be plotted separately using pstext.


      gmt, psbasemap, psxy

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