Provided by: gmt_4.5.11-1build1_amd64 bug

NAME

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

SYNOPSIS

       psxyz   files   -Jparameters   -Jz|Zparameters   -Rwest/east/south/north[/zmin/zmax][r]  [
       -B[p|s]parameters ] [ -Ccptfile ] [ -Ddx/dy[dz] ] [ -Eazim/elev[+wlon/lat[/z]][+vx0/y0]  ]
       [  -Gfill  ]  [  -H[i][nrec]  ]  [  -Iintens ] [ -K ] [ -L ] [ -N ] [ -O ] [ -P ] [ -Q ] [
       -S[symbol][size] ] [ -U[just/dx/dy/][c|label] ] [ -V ] [  -W[-|+][pen]  ]  [  -X[a|c|r][x-
       shift[u]]    ]    [    -Y[a|c|r][y-shift[u]]    ]   [   -Zzlevel   ]   [   -:[i|o]   ]   [
       -bi[s|S|d|D[ncol]|c[var1/...]]    ]    [    -ccopies     ]     [     -fcolinfo     ]     [
       -g[a]x|y|d|X|Y|D|[col]z[+|-]gap[u] ]  [ -m[flag] ]

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.
       Multiple segment files may be plotted using the -m option.  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.

       files  List one or more file-names. If no files are given, psxyz 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
              .gmtdefaults4, but this can be overridden on the command line by appending c, i, or
              m  to  the scale/width value.  When central meridian is optional, default is center
              of longitude range on -R option.  Default standard parallel is  the  equator.   For
              map  height,  max  dimension,  or  min  dimension,  append h, +, or - to the width,
              respectively.
              More details can be found in the psbasemap man pages.

              CYLINDRICAL PROJECTIONS:

              -Jclon0/lat0/scale (Cassini)
              -Jcyl_stere/[lon0/[lat0/]]scale (Cylindrical Stereographic)
              -Jj[lon0/]scale (Miller)
              -Jm[lon0/[lat0/]]scale (Mercator)
              -Jmlon0/lat0/scale (Mercator - Give meridian and standard parallel)
              -Jo[a]lon0/lat0/azimuth/scale (Oblique Mercator - point and azimuth)
              -Jo[b]lon0/lat0/lon1/lat1/scale (Oblique Mercator - two points)
              -Joclon0/lat0/lonp/latp/scale (Oblique Mercator - point and pole)
              -Jq[lon0/[lat0/]]scale (Cylindrical Equidistant)
              -Jtlon0/[lat0/]scale (TM - Transverse Mercator)
              -Juzone/scale (UTM - Universal Transverse Mercator)
              -Jy[lon0/[lat0/]]scale (Cylindrical Equal-Area)

              CONIC PROJECTIONS:

              -Jblon0/lat0/lat1/lat2/scale (Albers)
              -Jdlon0/lat0/lat1/lat2/scale (Conic Equidistant)
              -Jllon0/lat0/lat1/lat2/scale (Lambert Conic Conformal)
              -Jpoly/[lon0/[lat0/]]scale ((American) Polyconic)

              AZIMUTHAL PROJECTIONS:

              -Jalon0/lat0[/horizon]/scale (Lambert Azimuthal Equal-Area)
              -Jelon0/lat0[/horizon]/scale (Azimuthal Equidistant)
              -Jflon0/lat0[/horizon]/scale (Gnomonic)
              -Jglon0/lat0[/horizon]/scale (Orthographic)
              -Jglon0/lat0/altitude/azimuth/tilt/twist/Width/Height/scale (General Perspective).
              -Jslon0/lat0[/horizon]/scale (General Stereographic)

              MISCELLANEOUS PROJECTIONS:

              -Jh[lon0/]scale (Hammer)
              -Ji[lon0/]scale (Sinusoidal)
              -Jkf[lon0/]scale (Eckert IV)
              -Jk[s][lon0/]scale (Eckert VI)
              -Jn[lon0/]scale (Robinson)
              -Jr[lon0/]scale (Winkel Tripel)
              -Jv[lon0/]scale (Van der Grinten)
              -Jw[lon0/]scale (Mollweide)

              NON-GEOGRAPHICAL PROJECTIONS:

              -Jp[a]scale[/origin][r|z] (Polar coordinates (theta,r))
              -Jxx-scale[d|l|ppow|t|T][/y-scale[d|l|ppow|t|T]] (Linear, log, and power scaling)

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

       -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 w/e/s/n.  The two shorthands
              -Rg and -Rd stand for global domain (0/360 and -180/+180 in longitude respectively,
              with  -90/+90  in  latitude).   Alternatively, specify the name of an existing grid
              file and the -R settings (and grid spacing, if  applicable)  are  copied  from  the
              grid.   For  calendar  time  coordinates  you  may  either  give  (a) relative time
              (relative to the selected TIME_EPOCH and in the selected  TIME_UNIT;  append  t  to
              -JX|x),  or  (b)  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 exactly as indicated
              (however, input, output and plot formats are customizable; see gmtdefaults).

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.

       -C     Give  a  color  palette file.  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 line or polygon file (requires
              -m)  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 file.

       -D     Offset the plot symbol or line locations by the given amounts dx/dy[dz] [Default is
              no offset].

       -E     Sets  the  viewpoint's  azimuth and elevation (for perspective view) [180/90].  For
              frames used for animation, you may want to append + to fix the center of your  data
              domain  (or  specify a particular world coordinate point with +wlon0/lat[/z]) which
              will project to the center of your page size (or specify  the  coordinates  of  the
              projected view point with +vx0/y0).

       -G     Select  color  or  pattern for filling of symbols or polygons [Default is no fill].
              (See SPECIFYING FILL below).
              Note when -m is chosen, psxyz will  search  for  -G  and  -W  strings  in  all  the
              subheaders  and  let any values thus found over-ride the command line settings (see
              -m below).

       -H     Input file(s) has header record(s).  If used, the default number of header  records
              is  N_HEADER_RECS.   Use -Hi if only input data should have header records [Default
              will write out header records if the input data have them]. Blank lines  and  lines
              starting with # are always skipped.

       -I     Use  the  supplied  intens value (nominally in the -1 to + 1 range) to modulate the
              fill color by simulating illumination [none].

       -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.   Also,  in  concert with -C, -m, and -Z settings in the headers will use
              the implied color for polygon fill [Default is polygon pen color].  -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 system].

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

       -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     Plot symbols.  If present, size is symbol size in the  unit  set  in  .gmtdefaults4
              (unless c, i, m, 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  -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].  Note: if you give both size and symbol via
              the input file you must use MEASURE_UNIT to indicate the units used for the  symbol
              size.   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.  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 bbase to
              change this value.

       -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 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 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 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.

       -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].

       -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  km instead of plot-distance units.  An exception occurs for a linear
              projection in which we assume the dimensions are given in the same units as -R.

       -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
              in the psxy man page.

       -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
              ANNOT_FONT_PRIMARY].

       -Sm    math  angle arc, optionally with one or two arrow heads [NOT IMPLEMENTED YET].  The
              size is the radius of the arc.  Start and  stop  directions  (in  degrees  counter-
              clockwise  from  horizontal) for arc must be found in columns 3 and 4.  Use -Smf to
              add arrow head at first angle, -Sml for arrow head at last angle, and -Smb for both
              [Default is no arrow heads].

       -Sn    pentagon.  size is diameter of circumscribing circle.

       -So    column  (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  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.

       -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|f|n|l|x]info[:labelinfo].   The required argument controls the
              placement of  labels  along  the  quoted  lines.   Choose  among  five  controlling
              algorithms:

              ddist[c|i|m|p] or Ddist[d|e|k|m|n]
                     For  lower  case  d,  give  distances  between  labels  on  the plot in your
                     preferred measurement unit c (cm), i (inch), m (meter), or p (points), while
                     for upper case D, specify distances in map units and append the unit; choose
                     among e (m), k (km), m (mile), n (nautical mile), or d  (spherical  degree).
                     [Default is 10c or 4i].

              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|m|p]  to  enforce  that  a minimum distance separation between
                     successive labels is enforced.

              x|Xxfile.d
                     Reads the multi-segment file xfile.d and places labels at the  intersections
                     between the quoted lines and the lines inxfile.d.  X will resample the lines
                     first along great-circle arcs.

              In addition, you may optionally append +rradius[c|i|m|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|m|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.

              +ffont Sets the desired font [Default ANNOT_FONT_PRIMARY].

              +g[color]
                     Selects  opaque  text boxes [Default is transparent]; optionally specify the
                     color [Default is PAGE_COLOR].  (See SPECIFYING COLOR below).

              +jjust Sets label justification [Default is MC].  Ignored when -SqN|n+|-1 is used.

              +kcolor
                     Sets color of text labels [Default is  COLOR_BACKGROUND].   (See  SPECIFYING
                     COLOR below).

              +llabel
                     Sets the constant label text.

              +Lflag Sets the label text according to the specified flag:

                     +Lh    Take  the  label from the current multisegment 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|m|p as the unit [Default is MEASURE_UNIT].

                     +LD    Calculate actual map distances; append d|e|k|m|n 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|m|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].

              +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  boxsets  [Default  is  no  outline];  optionally
                     specify  pen for outline [Default is width = 0.25p, color = black, texture =
                     solid].  (See SPECIFYING PENS below).

              +rmin_rad
                     Will not place labels where the line's radius  of  curvature  is  less  than
                     min_rad [Default is 0].

              +ssize Sets the desired font size in points [Default is 9].

              +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].

       -Sr    rectangle.  No size needs to be specified, but the  x-  and  y-dimensions  must  be
              found in columns 4 and 5.

       -Ss    square.  size is diameter of circumscribing circle.

       -St    triangle.  size is diameter of circumscribing circle.

       -Su    cube (3-D).  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 and length must be found in columns 4 and 5 (this is a vector in
              the   horizontal   plane).    size,   if   present,   will   be   interpreted    as
              arrowwidth/headlength/headwidth    [Default    unit    is   0.075c/0.3c/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.   To center vector on balance point, use -Svb; to align point with the
              vector head, use -Svh; to align point with the vector tail, use -Svt [Default].  To
              give  the  head  point's  x,  y, z coordinates instead of direction and length, use
              -Svs.  Upper case B, H, T, S will draw a double-headed vector  [Default  is  single
              head].

       -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.)

       -Sw    pie   wedge.    Start  and  stop  directions  (in  degrees  counter-clockwise  from
              horizontal) for pie slice must be found in columns 4 and 5.

       -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.)

       -Sx    cross (x).  size is diameter of circumscribing circle.

       -Sy    y-dash (|).  size is the length of a short horizontal (y-dir) line segment.

       -Sz    zdash.  size is the length of a short vertical (z-dir) line segment.

       -U     Draw Unix System time stamp on plot.  By adding just/dx/dy/, the user  may  specify
              the justification of the stamp and where the stamp should fall on the page relative
              to lower left corner of the plot.  For example, BL/0/0 will align  the  lower  left
              corner  of  the  time  stamp  with  the lower left corner of the plot.  Optionally,
              append a label, or c (which will plot the command  string.).   The  GMT  parameters
              UNIX_TIME,  UNIX_TIME_POS,  and UNIX_TIME_FORMAT can affect the appearance; see the
              gmtdefaults man page for details.  The time string will be in the locale set by the
              environment variable TZ (generally local time).

       -V     Selects  verbose  mode,  which  will  send progress reports to stderr [Default runs
              "silently"].

       -W     Set pen attributes for lines or the outline of symbols [Defaults: width = 1,  color
              = black, texture = solid].  A leading + will use the lookup color (via -C) for both
              symbol fill and outline pen color, while a leading - will set outline pen color and
              turn off symbol fill.  (See SPECIFYING PENS below).

       -X -Y  Shift  plot  origin  relative  to  the  current  origin  by  (x-shift,y-shift)  and
              optionally append the length unit (c, i, m, p).  You can prepend  a  to  shift  the
              origin  back  to  the  original position after plotting, or prepend  r [Default] to
              reset the current origin to the new location.  If -O is used then the  default  (x-
              shift,y-shift)   is   (0,0),   otherwise  it  is  (r1i,  r1i)  or  (r2.5c,  r2.5c).
              Alternatively, give c to align the center coordinate (x or y) of the plot with  the
              center of the page based on current page size.

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

       -:     Toggles  between (longitude,latitude) and (latitude,longitude) input and/or output.
              [Default is (longitude,latitude)].  Append i to select input only or  o  to  select
              output only.  [Default affects both].

       -bi    Selects  binary  input.   Append  s  for  single precision [Default is d (double)].
              Uppercase S or D will force byte-swapping.  Optionally, append ncol, the number  of
              columns  in your binary input file if it exceeds the columns needed by the program.
              Or append c if the input  file  is  netCDF.  Optionally,  append  var1/var2/...  to
              specify the variables to be read.  [Default is the required number of columns given
              the chosen settings].

       -c     Specifies the number of plot copies. [Default is 1].

       -f     Special formatting of input and/or output  columns  (time  or  geographical  data).
              Specify  i  or  o  to  make  this apply only to input or output [Default applies to
              both].  Give one or more columns (or column ranges) separated by commas.  Append  T
              (absolute calendar time), t (relative time in chosen TIME_UNIT since TIME_EPOCH), x
              (longitude), y (latitude), or f (floating point) to each  column  or  column  range
              item.  Shorthand -f[i|o]g means -f[i|o]0x,1y (geographic coordinates).

       -g     Examine  the  spacing  between consecutive data points in order to impose breaks in
              the line.  Append x|X or y|Y to define a gap when there is a large enough change in
              the  x  or y coordinates, respectively, or d|D for distance gaps; use upper case to
              calculate gaps from projected coordinates.  For gap-testing on  other  columns  use
              [col]z;  if  col  is not prepended the it defaults to 2 (i.e., 3rd column).  Append
              [+|-]gap and optionally a unit u.  Regarding optional  signs:  -ve  means  previous
              minus  current  column  value must exceed |gap to be a gap, +ve means current minus
              previous column value must exceed gap, and no sign means the absolute value of  the
              difference  must  exceed gap.  For geographic data (x|y|d), the unit u may be meter
              [Default], kilometer, miles, or nautical miles.  For projected data (X|Y|D), choose
              from  inch, centimeter, meter, or points [Default unit set by MEASURE_UNIT].  Note:
              For x|y|z with time data the unit is instead controlled by TIME_UNIT.   Repeat  the
              option  to  specify  multiple  criteria,  of which any can be met to produce a line
              break.  Issue an additional -ga to indicate that all criteria must be met  instead.
              The -g option is ignored if -S is set.

       -m     Multiple segment file.  Segments are separated by a record whose first character is
              flag [Default is '>']. On these segment header records one or more of the following
              options can be added:
              -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- Turn outline off
              -W+ Revert to default pen (none if not set on command line)
              -Zzval Obtain fill via cpt lookup using z-value zval
              -ZNaN Get the NaN color from the cpt file

          SPECIFYING PENS

       pen    The  attributes  of  lines  and  symbol  outlines  as  defined  by  pen  is a comma
              delimetered list of width, color and texture, each of which is optional.  width can
              be   indicated   as   a   measure   (points,  centimeters,  inches)  or  as  faint,
              thin[ner|nest], thick[er|est], fat[ter|test], or obese.   color  specifies  a  gray
              shade  or  color  (see SPECIFYING COLOR below).  texture is a combination of dashes
              `-' and dots `.'.

   SPECIFYING FILL
       fill   The attribute fill specifies the solid shade or solid color (see  SPECIFYING  COLOR
              below)  or  the  pattern  used  for  filling  polygons.   Patterns are specified as
              pdpi/pattern, where pattern gives the number of the built-in pattern (1-90) or  the
              name  of  a  Sun  1-, 8-, or 24-bit raster file. The dpi sets the resolution of the
              image.  For  1-bit  rasters:  use  Pdpi/pattern  for  inverse  video,   or   append
              :Fcolor[B[color]]  to  specify  fore-  and  background  colors  (use  color = - for
              transparency).  See GMT Cookbook & Technical Reference Appendix E  for  information
              on individual patterns.

   SPECIFYING COLOR
       color  The color of lines, areas and patterns can be specified by a valid color name; by a
              gray shade (in the range 0-255); by a decimal color  code  (r/g/b,  each  in  range
              0-255;  h-s-v,  ranges  0-360,  0-1,  0-1;  or c/m/y/k, each in range 0-1); or by a
              hexadecimal color code (#rrggbb, as used in HTML).  See the gmtcolors  manpage  for
              more information and a full list of color names.

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:

       psxyz  heights.xyz  -R  0/10/0/10/0/100  -Jx  1.25c  -Jz  0.125c  -So  1.25c  -G  blue  -B
       2:XLABEL:/2:YLABEL:/10:ZLABEL::."3-D PLOT":15 -E 135/30 -Uc -W -P > heights.ps

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.
       The  -N option does not adjust the BoundingBox information so you may have to post-process
       the PostScript output with ps2raster -A to obtain the correct BoundingBox.

SEE ALSO

       GMT(1), gmtcolors(5), psbasemap(1), psxy(1)