## NAME

          psxy - Plot lines, polygons, and symbols on maps

## SYNOPSIS

          psxy files -Jparameters -Rwest/east/south/north[r] [ -A ] [ -Btickinfo
          ] [ -Ccptfile ] [ -E[x|y][cap][/pen] ] [ -Gfill ] [ -H[nrec] ] [ -K ] [
          -L ] [ -N ] [ -M[flag] ] [ -O ] [ -P ] [ -S[symbol][size] ] [
          -U[/dx/dy/][label] ] [ -V ] [ -W[pen] ] [ -Xx-shift ] [ -Yy-shift ] [
          -: ] [ -ccopies ] [ -bi[s][n] ]

## DESCRIPTION

          psxy reads (x,y) pairs from files [or standard input] and generates
          PostScript code that will plot lines, polygons, or symbols at those
          locations on a map.  If a symbol is selected and no symbol size given,
          then psxy will interpret the third column of the input data as symbol
          size 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 -S is not
          selected, a line connecting the data points will be drawn instead.  To
          explicitly close polygons, use -L.  Select a shade with -G.  If -G is
          set, -W will control whether the polygon outline is drawn or not.  If
          a symbol is selected, -G and -W determines the fill color and
          outline/no outline, respectively.  The PostScript code is written to
          standard output.

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

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

               CYLINDRICAL PROJECTIONS:

               -Jclon0/lat0/scale (Cassini)
               -Jjlon0/scale (Miller)
               -Jmscale (Mercator - Greenwich and Equator as origin)
               -Jmlon0/lat0/scale (Mercator - Give meridian and standard
               parallel)
               -Joalon0/lat0/azimuth/scale (Oblique Mercator - point and
               azimuth)
               -Joblon0/lat0/lon1/lat1/scale (Oblique Mercator - two points)
               -Joclon0/lat0/lonp/latp/scale (Oblique Mercator - point and pole)
               -Jqlon0/scale (Equidistant Cylindrical Projection (Plate Carree))
               -Jtlon0/scale (TM - Transverse Mercator, with Equator as y = 0)
               -Jtlon0/lat0/scale (TM - Transverse Mercator, set origin)
               -Juzone/scale (UTM - Universal Transverse Mercator)
               -Jylon0/lats/scale (Basic Cylindrical Projection)

               AZIMUTHAL PROJECTIONS:

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

               CONIC PROJECTIONS:

               -Jblon0/lat0/lat1/lat2/scale (Albers)
               -Jdlon0/lat0/lat1/lat2/scale (Equidistant)
               -Jllon0/lat0/lat1/lat2/scale (Lambert)

               MISCELLANEOUS PROJECTIONS:

               -Jhlon0/scale (Hammer)
               -Jilon0/scale (Sinusoidal)
               -Jk[f|s]lon0/scale (Eckert IV (f) and VI (s))
               -Jnlon0/scale (Robinson)
               -Jrlon0/scale (Winkel Tripel)
               -Jvlon0/scale (Van der Grinten)
               -Jwlon0/scale (Mollweide)

               NON-GEOGRAPHICAL PROJECTIONS:

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

          -R   west, east, south, and north specify the Region of interest.  To
               specify boundaries in degrees and minutes [and seconds], use the
               dd:mm[:ss] format.  Append r if lower left and upper right map
               coordinates are given instead of wesn.

## OPTIONS

          No space between the option flag and the associated arguments.

          -A   Suppress drawing line segments as great circle Arcs.  [Default
               draws great circle arcs.]

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

          -C   Give a color palette file and let symbol color be determined by
               the z-value in the third column.  Must be used with -S.  If used,
               then additional fields are shifted over by one column (optional
               size would be 4th rather than 3rd field, etc.).

          -E   Draw error bars.  Append x and/or y to indicate which bars you
               want to draw (Default is both x and y).  The x and/or y errors
               must be stored in the columns after the (x,y) pair [or (x,y,size)
               triplet].  The cap parameter indicates the length of the end-cap
               on the error bars in inch [0.1i].  Pen attributes for error bars
               may also be set.  [Defaults: width = 1, color = 0/0/0, texture =
               solid].

          -G   Select filling of polygons and symbols.  Append the shade
               (0-255), color (r/g/b), or p|pdpi/pattern (polygons only)
               [Default is no fill].  Note when -M is chosen, psxy will search
               for -G and -W strings in all the subheaders and let any found
               values over-ride the command line settings.

          -H   Input file(s) has Header record(s).  Number of header records can
               be changed by editing your .gmtdefaults file.  If used, GMT
               default is 1 header record.

          -K   More PostScript code will be appended later [Default terminates
               the plot system].

          -L   Force closed polygons: connect the endpoints of the line-
               segment(s) and draw polygons.

          -M   Multiple segment file.  Segments are separated by a record whose
               first character is flag.  [Default is '>'].

          -N   Do NOT skip symbols that fall outside map border [Default plots
               points inside border only].

          -O   Selects Overlay plot mode [Default initializes a new plot
               system].

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

          -S   Plot symbols.  If present, 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 the circle, while the
               corresponding lowercase symbols all are circumscribed by the
               circle.  Choose between these symbol codes:

          -S   Read symbol code (see below) from last column in the input data.
               Cannot be used in conjunction with -b.  Optionally, append c, i,
               m, p to indicate that the size information in the input data is
               in units of cm, inch, meter, or point, respectively. [Default is
               MEASURE_UNIT].

          -Sa  star.  size is diameter of circumscribing circle.

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

          -Sc  circle.  size is diameter of circle.

          -Sd  diamond.  size is diameter of circumscribing circle.

          -Se  ellipse.  Direction (in degrees counterclockwise from
               horizontal), major_axis (in inch), and minor_axis (in inch) must
               be found in columns 3, 4, and 5.

          -SE  Same as -Se, except azimuth (in degrees east of north) should be
               given instead of direction.  The azimuth will be mapped into an
               angle based on the chosen map projection (-Se leaves the
               directions unchanged.)  Furthermore, the axes lengths must be
               given in km instead of 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 *.

          -Sp  point.  No size needs to be specified (1 pixel is used).

          -Ss  square.  size is diameter of circumscribing circle.

          -St  triangle.  size is diameter of circumscribing circle.

          -Sv  vector.  Direction (in degrees counterclockwise from horizontal)
               and length (in inch) must be found in columns 3 and 4.  size, if
               present, will be interpreted as 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 (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.)

          -Sx  cross.  size is diameter of circumscribing circle.

          -U   Draw Unix System time stamp on plot.  User may specify where the
               lower left corner of the stamp should fall on the page relative
               to lower left corner of plot 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 symbols with selected
               pen.

          -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.

          -:   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
               chosen settings].

## EXAMPLES

          To plot solid red circles (diameter = 0.1 inch) at the positions
          listed in the file DSDP.xy on a Mercator map at 2 inch/degree of the
          area 150E to 154E, 18N to 23N, with tickmarks every 1 degree and
          gridlines every 15 minutes, try:

          psxy DSDP.xy -R150/154/18/23 -Jm2i -Sc0.1i -G255/0/0 -B1g15m | lpr

          To plot the xyz values in the file quakes.xyzm as circles with size
          given by the magnitude in the 4th column and color based on the depth
          in the third using the color palette cpt on a linear map, try

          psxy quakes.xyzm -R0/1000/0/1000 -JX6i -Sc -Ccpt -B200 > map.ps

          To plot the file trench.xy on a Mercator map, with white triangles
          with sides 0.1 inch on the left side of the line, spaced every 0.8
          inch, use

          psxy trench.xy -R150/200/20/50 -Jm0.15i -Sf0.8i/0.1iL -G255 -W -B10 |
          lpr br

          To plot the data in the file misc.d as symbols determined by the code
          in the last column, and with size given by the magnitude in the 4th
          column, and color based on the third column via the color palette cpt
          on a linear map, try

          psxy misc.d -R0/100/-50/100 -JX6i -S -Ccpt -B20 > t.ps

## BUGS

          The -N option does not adjust the BoundingBox information so you may
          have to post-process the PostScript outout with epstool or ps2epsi to
          obtain a correct BoundingBox.

## SEE ALSO

          gmt, psbasemap, psxyz