NAME

       psxy - Plot lines, polygons, and symbols on maps


SYNOPSIS

       psxy  files -Jparameters -Rwest/east/south/north[r] [ -A ] [ -Btickinfo
       ] [ -Ccptfile ] [ -E[x|y|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.  Symbols whose size is <= 0 are skipped.  If no symbols are spec-
       ified then the symbol code (see -S below) must be present as last  col-
       umn  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  out-
       line  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  UNIT/degree,  1:xxxxx,  or
              width  in  UNIT  (upper case modifier).  UNIT is cm, inch, or m,
              depending on the MEASURE_UNIT setting in .gmtdefaults, but  this
              can  be overridden on the command line by appending the c, i, or
              m to the scale/width value.

              CYLINDRICAL PROJECTIONS:

              -Jclon0/lat0/scale (Cassini)
              -Jjlon0/scale (Miller)
              -Jmscale (Mercator - Greenwich and Equator as origin)
              -Jmlon0/lat0/scale (Mercator - Give meridian and standard paral-
              lel)
              -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 Car-
              ree))
              -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/[slat/]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:

              -Jp[a]scale[/origin] (polar (theta,r)  coordinates,  optional  a
              for azimuths and offset theta [0])
              -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 the psbasemap man page
              for details.

       -C     Give a color palette file.  When used with -S, lets symbol color
              be determined by the z-value in the  third  column.   Additional
              fields  are  shifted  over by one column (optional size would be
              4th rather than 3rd field,  etc.).   If  -S  is  not  set,  psxy
              expects the user to supply a multisegment polygon file (requires
              -M) and will look for -Zval strings in each multisegment header.
              The val will control the color via the cpt file.

       -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 [0.25c (or 0.1i)].  Pen attributes
              for error bars may also be set.  [Defaults: width = 1,  color  =
              0/0/0,  texture  =  solid].  If upper case X and/or Y is used we
              will instead draw "box-and-whisker"  (or  "stem-and-leaf")  sym-
              bols.   The  x  (or  y)  coordinate  is then taken as the median
              value, and 4 more columns are expected to  contain  the  minimum
              (0% quartile), the 25% quartile, the 75% quartile, and the maxi-
              mum (100% quartile) values.  The 25-75% box  may  be  filled  by
              using -G.

       -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-seg-
              ment(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].  The option does not apply to lines
              and polygons which are always clipped to the map region.

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

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

       -S     Plot symbols.  If present, size is symbol size in the  unit  set
              in  .gmtdefaults (unless c, i, m, or p is appended).  The upper-
              case 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  sym-
              bol 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 plot-distance units]. 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 counter-clockwise from horizon-
              tal), major_axis, and minor_axis 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 direc-
              tions unchanged.)  Furthermore, the axes lengths must  be  given
              in km instead of plot-distance units.

       -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].

       -Sh    hexagon.  size is diameter of circumscribing circle.

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

       -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 charac-
              ters.   Remember  to  escape special characters like *.  Option-
              ally, you may append %font to select a particular font  [Default
              is ANOT_FONT].

       -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 counter-clockwise from horizon-
              tal) and length must be found in columns  3  and  4.   size,  if
              present,  will be interpreted as arrowwidth/headlength/headwidth
              [Default  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  decreas-
              ing  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  direc-
              tions unchanged.)

       -Sw    pie wedge.  Start and stop directions (in degrees counter-clock-
              wise from horizontal) for pie slice must be found in  columns  3
              and 4.

       -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.  Optionally, append a label, or c
              (which will plot  the  command  string.).   The  GMT  parameters
              UNIX_TIME  and  UNIX_TIME_POS can affect the appearance; see the
              gmtdefaults man page for details.

       -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, tex-
              ture = solid].  Implicitly draws the  outline  of  symbols  with
              selected pen.

       -X -Y  Shift  origin of plot by (x-shift,y-shift).  Prepend a for abso-
              lute coordinates; the default (r) will reset plot origin.

       -:     Toggles between  (longitude,latitude)  and  (latitude,longitude)
              input/output.   [Default  is  (longitude,latitude)].  Applies to
              geographic coordinates only.

       -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 = 0.25 cm) at the positions listed
       in the file DSDP.xy on a Mercator map at 5 cm/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 -Jm5c -Sc0.25c -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  0.25  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/0.1ilt -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.
       psxy 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(l), psbasemap(l), psxyz(l)



VERSION                              DATE                              PSXY(l)

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