pspolar - Plot polarities on the inferior focal half−sphere on maps


pspolar files −Jparameters −Rwest/east/south/north −Dlongitude/latitude −Msize −S<symbol><size> [ −Btickinfo ] [ −Clongitude/latitude[/dash_width/pointsize] ] [ −Fred/green/blue ] [ −Gfill ] [ −gfill ] [ −H ] [ −h ] [ −K ] [ −L ] [ −N ] [ −O ] [ −P ] [ −sHalf-size[v[[<v_width/h_length/h_width/shape>]][g[<r/g/b>]][l] [ -Tangle/form/justify/fontsize ] [ -t<pen> ] [ −U[label] ] [ −V ] [ −Wpen ] [ −Xx-shift ] [ −Yy-shift ] [ −ccopies ]


pspolar reads data values from files [or standard input] and generates PostScript code that will plot stations on focal mechanisms on a map. The PostScript code is written to standard output.

Parameters are expected to be in the following columns


station_code, azimuth, take-off angle, polarity

- compression can be c,C,u,U,+
- rarefaction can be d,D,r,R,-
- not defined is anything else


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


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. 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.


−Jclon0/lat0/scale (Cassini)
lon0/scale (Miller)
scale (Mercator - Greenwich and Equator as origin)
lon0/lat0/scale (Mercator - Give meridian and standard parallel)
lon0/lat0/azimuth/scale (Oblique Mercator - point and azimuth)
lon0/lat0/lon1/lat1/scale (Oblique Mercator - two points)
lon0/lat0/lonp/latp/scale (Oblique Mercator - point and pole)
lon0/scale (Equidistant Cylindrical Projection (Plate Carree))
lon0/scale (TM - Transverse Mercator, with Equator as y = 0)
lon0/lat0/scale (TM - Transverse Mercator, set origin)
zone/scale (UTM - Universal Transverse Mercator)
lon0/lats/scale (Basic Cylindrical Projection)


−Jalon0/lat0/scale (Lambert)
lon0/lat0/scale (Equidistant)
lon0/lat0/horizon/scale (Gnomonic)
lon0/lat0/scale (Orthographic)
lon0/lat0/[slat/]scale (General Stereographic)


−Jblon0/lat0/lat1/lat2/scale (Albers)
lon0/lat0/lat1/lat2/scale (Equidistant)
lon0/lat0/lat1/lat2/scale (Lambert)


−Jhlon0/scale (Hammer)
lon0/scale (Sinusoidal)
[f|s]lon0/scale (Eckert IV (f) and VI (s))
lon0/scale (Robinson)
lon0/scale (Winkel Tripel)
lon0/scale (Van der Grinten)
lon0/scale (Mollweide)


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


west, east, south, and north specify the Region of interest, and you may specify them in decimal degrees or in [+-]dd:mm[][W|E|S|N] format. Append r if lower left and upper right map coordinates are given instead of wesn. The two shorthands −Rg −Rd stand for global domain (0/360 or -180/+180 in longitude respectively, with -90/+90 in latitude).


Maps the bubble at given longitude and latitude point.


Sets the size of the beach ball to plot polarities in. Size is in inch (unless c, i, m, or p is appended).


Selects symbol_type and symbol size. Size is in inch (unless c, i, m, or p is appended). Choose symbol type from st(a)r, (c)ircle, (d)iamond, (h)exagon, (i)nverted triangle, (p)oint, (s)quare, (t)riangle, (x)cross.


No space between the option flag and the associated arguments.


Sets map boundary annotation and tickmark intervals; see the psbasemap man page for all the details.


Offsets focal mechanisms to the latitude and longitude specified in the last two columns of the input file.


Selects filling of symbols for stations in extensive quadrants. Set the shade (0−255) or color (r/g/b) [Default is 250/250/250]. If -Efill is the same as -Ffill, use -e to outline.


Outline symbols in extensive quadrants using pen or the default pen (see −W).


Sets background color of the beach ball. Default is no fill.


Outline the beach ball using pen or the default pen (see −W).


Selects filling of symbols for stations in compressional quadrants. Set the shade (0−255) or color (r/g/b) [Default is 0/0/0].


Outline symbols in compressional quadrants using pen or the default pen (see −W).


Input file(s) has Header record(s). Number of header records can be changed by editing your .gmtdefaults4 file. If used, GMT default is 1 header record. Use −Hi if only input data should have header records [Default will write out header records if the input data have them].


Use special format derived from HYPO71 output


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


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


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


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


Plots S polarity azimuth.
S polarity is in last column. It may be a vector (V option) or a segment. Give half−size,v_width,h_length,h_width in inch (unless c, i, m, or p is appended). [L] option is for outline.

−Tangle/form/justify/fontsize in points

To write station code. [Default is 0.0/0/5/12].


Set pen color to write station code. Default uses the default pen (see −W).


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.


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


Set current pen attributes [Defaults: width = 1, color = 0/0/0, texture = solid].

−X −Y

Shift origin of plot by (x-shift,y-shift). Prepend a for absolute coordinates; the default (r) will reset plot origin. Give c to center plot using current page size.


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].


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


pspolar −R239/240/34/35.2 −JM8 −N −Sc0.4 −H1 −D239.5/34.5 −M5 <<END>!
stat azim ih pol
0481 11 147 c
6185 247 120 d
0485 288 114 +
0490 223 112 -
0487 212 109 .
pspolar −R
239/240/34/35.2 −JM8 −N −Sc0.4 −H1 −D239.5/34.5 −M5 −h <<END>!
Date Or. time stat azim ih
910223 1 22 0481 11 147 ipu0
910223 1 22 6185 247 120 ipd0
910223 1 22 0485 288 114 epu0
910223 1 22 0490 223 112 epd0
910223 1 22 0487 212 109 epu0


GMT(l), psbasemap(l), psxy(l)


Bomford, G., Geodesy, 4th ed., Oxford University Press, 1980.
Aki, K. and P. Richards, Quantitative Seismology, Freeman, 1980.


Genevieve Patau
Seismology Dept.
Institut de Physique du Globe de Paris