NAME

       gmtdefaults - To list current GMT defaults


SYNOPSIS

       gmtdefaults -D[u|s] | -L


DESCRIPTION

       gmtdefaults  lists the GMT parameter defaults if the option -D is used.
       There are three ways to change some of the settings: (1) Use  the  com-
       mand  gmtset,  (2) use any texteditor to edit the file .gmtdefaults4 in
       your home or current directory (if you do not have this file, run  gmt-
       defaults  -D  > ~/.gmtdefaults4 to get one with the system default set-
       tings), or (3) overrid any parameter by specifying one or more --PARAM-
       ETER=VALUE  statements on the commandline of any GMT command (PARAMETER
       and VALUE are any combination listed below). The first two options  are
       permanent  changes until explicitly changed back, while the last option
       is emphemeral and only applies to the single GMT command that  received
       the  override.   GMT can provide default values in US or SI units. This
       choice is determined by the contents of  the  gmt.conf  file  in  GMT’s
       share directory.

       -D     Print  the  system GMT defaults to standard output. Append u for
              US defaults or s for SI defaults. [-D alone gives current choice
              in gmt.conf].

       -L     Print the user’s currently active defaults to standard output.

              Your  currently active defaults come from the .gmtdefaults4 file
              in the current working directory,  if  present;  else  from  the
              .gmtdefaults4 file in your home directory, if present; else from
              the system defaults set at the time GMT was compiled.


GMT PARAMETERS

       The following is a list of the parameters that  are  user-definable  in
       GMT.  The parameter names are always given in UPPER CASE. The parameter
       values are case-insensitive unless otherwise noted. The system defaults
       are given in brackets [ for SI (and US) ]. Those marked * can be set on
       the command line as well (the corresponding option is given  in  paren-
       theses).  Note  that  default  distances and lengths below are given in
       both cm or inch; the chosen default depends on your choice  of  default
       unit  (see  MEASURE_UNIT). You can explicitly specify the unit used for
       distances and lengths by appending c (cm), i (inch), m  (meter),  or  p
       (points).  When no unit is indicated the value will be assumed to be in
       the unit  set  by  MEASURE_UNIT.   Note  that  the  printer  resolution
       DOTS_PR_INCH  is always the number of dots or pixels per inch.  Several
       parameters take only TRUE or FALSE.

       ANNOT_MIN_ANGLE
              If the angle between the map boundary and the  annotation  base-
              line  is  less than this minimum value (in degrees), the annota-
              tion is not plotted (this may occur for certain oblique  projec-
              tions.) Give a value in the range 0-90. [20]

       ANNOT_MIN_SPACING
              If  an  annotation  would be plotted less than this minimum dis-
              tance from its closest neighbor, the annotation is  not  plotted
              (this may occur for certain oblique projections.) [0]

       ANNOT_FONT_PRIMARY
              Font  used  for  upper  annotations,  etc.  [Helvetica]. Specify
              either the font number or the font name (case  sensitive!).  The
              39 available fonts are:
                      0 Helvetica
                      1 Helvetica-Bold
                      2 Helvetica-Oblique
                      3 Helvetica-BoldOblique
                      4 Times-Roman
                      5 Times-Bold
                      6 Times-Italic
                      7 Times-BoldItalic
                      8 Courier
                      9 Courier-Bold
                      10 Courier-Oblique
                      11 Courier-BoldOblique
                      12 Symbol
                      13 AvantGarde-Book
                      14 AvantGarde-BookOblique
                      15 AvantGarde-Demi
                      16 AvantGarde-DemiOblique
                      17 Bookman-Demi
                      18 Bookman-DemiItalic
                      19 Bookman-Light
                      20 Bookman-LightItalic
                      21 Helvetica-Narrow
                      22 Helvetica-Narrow-Bold
                      23 Helvetica-Narrow-Oblique
                      24 Helvetica-Narrow-BoldOblique
                      25 NewCenturySchlbk-Roman
                      26 NewCenturySchlbk-Italic
                      27 NewCenturySchlbk-Bold
                      28 NewCenturySchlbk-BoldItalic
                      29 Palatino-Roman
                      30 Palatino-Italic
                      31 Palatino-Bold
                      32 Palatino-BoldItalic
                      33 ZapfChancery-MediumItalic
                      34 ZapfDingbats
                      35 Ryumin-Light-EUC-H
                      36 Ryumin-Light-EUC-V
                      37 GothicBBB-Medium-EUC-H
                      38 GothicBBB-Medium-EUC-V

       ANNOT_FONT_SIZE_PRIMARY
              Font size (> 0) in points for map annotations. [14]

       ANNOT_FONT_SECONDARY
              Font   to   use   for   time  axis  secondary  annotations.  See
              ANNOT_FONT_PRIMARY for available fonts [Helvetica].

       ANNOT_FONT_SIZE_SECONDARY
              Font size (> 0) for time axis secondary  annotations  in  points
              [16].

       ANNOT_OFFSET_PRIMARY
              Distance  from  end of tickmark to start of annotation [0.2c (or
              0.075i)]. A negative offset will place the annotation inside the
              map border.

       ANNOT_OFFSET_SECONDARY
              Distance  from base of primary annotation to the top of the sec-
              ondary annotation [0.2c (or 0.075i)] (Only applies to time  axes
              with both primary and secondary annotations).

       BASEMAP_AXES
              Sets which axes to draw and annotate. Case sensitive: Upper case
              means both draw and annotate, lower case means draw  axis  only.
              [WESN].

       BASEMAP_FRAME_RGB
              Color  used  to  draw  map  boundaries  and annotations.  Give a
              red/green/blue triplet, with each element in  the  0-255  range.
              [0/0/0] (black).

       BASEMAP_TYPE
              Choose  between  plain  and  fancy  (thick boundary, alternating
              black/white frame; append + for rounded corners)  [fancy].   For
              some map projections (e.g., Oblique Mercator), plain is the only
              option even if fancy is set as default.  In general, fancy  only
              applies  to  situations  where  the projected x and y directions
              parallel the lon and lat directions (e.g.,  rectangular  projec-
              tions, polar projections).

       CHAR_ENCODING
              Names  the  eight bit character set being used for text in files
              and in command line parameters. This allows GMT to  ensure  that
              the  PostScript  output  generates the correct characters on the
              plot.. Choose from Standard, Standard+,  ISOLatin1,  ISOLatin1+,
              and  ISO-8859-x  (where  x  is in the ranges 1-10 or 13-15). See
              Appendix F for details [ISOLatin1+ (or Standard+)].

       COLOR_BACKGROUND
              Color used for the background of images (i.e., when z  <  lowest
              colortable  entry).   Give  a  red/green/blue triplet, with each
              element in the 0-255 range. [0/0/0] (black)

       COLOR_FOREGROUND
              Color used for the foreground of images (i.e., when z >  highest
              colortable  entry).   Give  a  red/green/blue triplet, with each
              element in the 0-255 range. [255/255/255] (white)

       COLOR_IMAGE
              Selects which operator to use when  rendering  bit-mapped  color
              images.  Due  to  the  lack  of  the colorimage operator in some
              PostScript implementations, GMT offers 2 different options:

                      adobe (Adobe’s colorimage definition)  [Default].
                      tiles (Plot image as many individual rectangles).

       COLOR_MODEL
              Selects if color palette files  contain  rgb  values  (r,g,b  in
              0-255 range) or HSV values (h in 0-360, s,v in 0-1 range) [rgb].

       COLOR_NAN
              Color used for the non-defined areas of images (i.e., where z ==
              NaN).   Give  a red/green/blue triplet, with each element in the
              0-255 range. [128/128/128] (gray)

       D_FORMAT
              Output format (C language printf syntax) to be used when  print-
              ing  double  precision  floating  point numbers.  For geographic
              coordinates, see OUTPUT_DEGREE_FORMAT. [%lg].

       DEGREE_SYMBOL
              Determines what symbol is used to plot the degree symbol on geo-
              graphic  map  annotations.  Choose  between ring, degree, colon,
              none [ring].

       DOTS_PR_INCH
              Resolution of the plotting device (dpi). Note that in  order  to
              be  as  compact  as possible, GMT PostScript output uses integer
              formats only so the resolution should be set depending  on  what
              output device you are using. E.g, using 300 and sending the out-
              put to a Linotype 300 phototypesetter (2470 dpi) will  not  take
              advantage of the extra resolution (i.e., positioning on the page
              and line thicknesses are still only done in steps of 1/300 inch;
              of course, text will look smoother) [300].

       ELLIPSOID
              The (case sensitive) name of the ellipsoid used for the map pro-
              jections [WGS-84]. Choose among

              WGS-84 1984 World Geodetic System [Default]
              OSU91A 1991 Ohio State University
              OSU86F 1986 Ohio State University
              Engelis 1985 Goodard Earth Models
              SGS-85 1985 Soviet Geodetic System
              MERIT-83 1983 United States Naval Observatory
              GRS-80 1980 International Geodetic Reference System
              Lerch 1979 For geoid modelling
              ATS77 1977 Average Terrestrial System, Canada Maritime provinces
              IAG-75 1975 International Association of Geodesy
              Indonesian 1974 Applies to Indonesia
              WGS-72 1972 World Geodetic System
              NWL-10D 1972 Naval Weapons Lab (Same as WGS-72)
              South-American 1969 Applies to South America
              Fischer-1968 1968 Used by NASA for Mercury program
              Modified-Mercury-1968 1968 Same as Fischer-1968
              GRS-67 1967 International Geodetic Reference System
              International-1967 1967 Worldwide use
              WGS-66 1966 World Geodetic System
              NWL-9D 1966 Naval Weapons Lab (Same as WGS-66)
              Australian 1965 Applies to Australia
              APL4.9 1965 Appl. Physics
              Kaula 1961 From satellite tracking
              Hough 1960 Applies to the Marshall Islands
              WGS-60 1960 World Geodetic System
              Fischer-1960 1960 Used by NASA for Mercury program
              Mercury-1960 1960 Same as Fischer-1960
              Modified-Fischer-1960 1960 Applies to Singapore
              Fischer-1960-SouthAsia 1960 Same as Modified-Fischer-1960
              Krassovsky 1940 Used in the (now former) Soviet Union
              War-Office 1926 Developed by G. T. McCaw
              International-1924 1924 Worldwide use
              Hayford-1909 1909 Same as the International 1924
              Helmert-1906 1906 Applies to Egypt
              Clarke-1880 1880 Applies to most of Africa, France
              Clarke-1880-Arc1950 1880 Modified Clarke-1880 for Arc 1950
              Clarke-1880-IGN 1880 Modified Clarke-1880 for IGN
              Clarke-1880-Jamaica 1880 Modified Clarke-1880 for Jamaica
              Clarke-1880-Merchich 1880 Modified Clarke-1880 for Merchich
              Clarke-1880-Palestine 1880 Modified Clarke-1880 for Palestine
              Andrae 1876 Applies to Denmark and Iceland
              Clarke-1866 1866 Applies to North America, the Philippines
              Clarke-1866-Michigan 1866 Modified Clarke-1866 for Michigan
              Struve 1860 Friedrich Georg Wilhelm Struve
              Clarke-1858 1858 Clarke’s early ellipsoid
              Airy 1830 Applies to Great Britain
              Airy-Ireland 1830 Applies to Ireland in 1965
              Modified-Airy 1830 Same as Airy-Ireland
              Bessel 1841 Applies to Central Europe, Chile, Indonesia
              Bessel-Schwazeck 1841 Applies to Namibia
              Bessel-Namibia 1841 Same as Bessel-Schwazeck
              Bessel-NGO1948 1841 Modified Bessel for NGO 1948
              Everest-1830 1830 India, Burma, Pakistan, Afghanistan, Thailand
              Everest-1830-Kalianpur   1830  Modified  Everest  for  Kalianpur
              (1956)
              Everest-1830-Kertau 1830 Modified Everest for Kertau, Malaysia &
              Singapore
              Everest-1830-Timbalai  1830 Modified Everest for Timbalai, Sabah
              Sarawak
              Everest-1830-Pakistan 1830 Modified Everest for Pakistan
              Walbeck 1819 First least squares solution by Finnish astronomer
              Plessis 1817 Old ellipsoid used in France
              Delambre 1810 Applies to Belgium
              CPM 1799 Comm. des Poids et Mesures, France
              Maupertius 1738 Really old ellipsoid used in France
              Sphere 1980 The mean radius in GRS-80 (for spherical/plate  tec-
              tonics applications)

              Note that for some global projections, GMT may default to GRS-80
              Sphere regardless of ellipsoid actually chosen. A  warning  will
              be  given  when this happens. If a different ellipsoid name than
              those mentioned here is given, GMT will attempt to open  a  file
              with  that  name  in  the  current  directory, and read a single
              record that contains the ellipsoid name,  year,  major-axis  (in
              m), minor-axis (in m), and flattening (f) from the first record,
              where the fields must be separated by white-space (not  commas).
              This way a custom ellipsoid (e.g., those used for other planets)
              may be used. A negative flattening means  GMT  will  recalculate
              flattening from the two radii.

       FIELD_DELIMITER
              This  setting determines what character will separate ASCII out-
              put data columns written by GMT. Choose from tab, space,  comma,
              and none [tab].

       FRAME_PEN
              Thickness  of  pen  used to draw plain map frame in dpi units or
              points (append p) [1.25p].

       FRAME_WIDTH
              Width (> 0) of  map  borders  for  fancy  map  frame  [0.2c  (or
              0.075i)].

       GLOBAL_X_SCALE
              Global  x-scale  (> 0) to apply to plot-coordinates before plot-
              ting. Normally used to shrink the entire output down  to  fit  a
              specific height/width [1.0].

       GLOBAL_Y_SCALE
              Same, but for y-coordinates [1.0].

       GRID_CROSS_SIZE_PRIMARY
              Size (>= 0) of grid cross at lon-lat intersections. 0 means draw
              continuous gridlines instead [0].

       GRID_PEN_PRIMARY
              Pen thickness used to draw grid lines in  dpi  units  or  points
              (append p) [0.25p].

       GRID_CROSS_SIZE_SECONDARY
              Size  (>= 0) of grid cross at secondary lon-lat intersections. 0
              means draw continuous gridlines instead [0].

       GRID_PEN_SECONDARY
              Pen thickness used to draw grid lines in  dpi  units  or  points
              (append p) [0.5p].

       GRIDFILE_SHORTHAND
              If  TRUE, all gridfile names are examined to see if they use the
              file extension shorthand discussed in Section 4.17  of  the  GMT
              Technical  Reference and Cookbook.  If FALSE, no filename expan-
              sion is done [FALSE].

       HEADER_FONT
              Font to use when plotting headers.  See  ANNOT_FONT_PRIMARY  for
              available fonts [Helvetica].

       HEADER_FONT_SIZE
              Font size (> 0) for header in points [36].

       HEADER_OFFSET
              Distance  from  top  of  axis  annotations  (or  axis  label, if
              present) to base of plot header [0.5c (or 0.1875i)].

       HSV_MIN_SATURATION
              Minimum saturation (0-1) assigned for  most  negative  intensity
              value [1.0].

       HSV_MAX_SATURATION
              Maximum  saturation  (0-1)  assigned for most positive intensity
              value [0.1].

       HSV_MIN_VALUE
              Minimum value (0-1) assigned for most negative  intensity  value
              [0.3].

       HSV_MAX_VALUE
              Maximum  value  (0-1) assigned for most positive intensity value
              [1.0].

       INPUT_CLOCK_FORMAT
              Formatting template that indicates how an input clock string  is
              formatted.  This  template  is then used to guide the reading of
              clock strings in data fields. To properly decode 12-hour clocks,
              append  am  or pm (or upper case) to match your data records. As
              examples, try hh:mm, hh:mm:ssAM, etc. [hh:mm:ss].

       INPUT_DATE_FORMAT
              Formatting template that indicates how an input date  string  is
              formatted.  This  template  is then used to guide the reading of
              date strings in data fields. You may  specify  either  Gregorian
              calendar format or ISO week calendar format. Gregorian calendar:
              Use any combination of yyyy (or yy for 2-digit years; if so  see
              Y2K_OFFSET_YEAR),  mm  (or  o  for abbreviated month name in the
              current time language), and dd, with or without delimiters.  For
              day-of-year data, use jjj instead of mm and/or dd.  Examples can
              be ddmmyyyy, yy-mm-dd,  dd-o-yyyy,  yyyy/dd/mm,  yyyy-jjj,  etc.
              ISO  Calendar:  Expected template is yyyy[-]W[-]ww[-]d, where ww
              is ISO week and d is ISO week day. Either template must be  con-
              sistent,  e.g.,  you  cannot specify months if you don’t specify
              years. Examples are yyyyWwwd, yyyy-Www, etc. [yyyy-mm-dd].

       INTERPOLANT
              Determines if linear (linear), Akima’s spline (akima), or  natu-
              ral  cubic  spline (cubic) should be used for 1-D interpolations
              in various programs [akima].

       IO_HEADER * (-H)
              Specifies whether input/output ASCII files have header record(s)
              or not [FALSE].

       N_HEADER_RECS
              Specifies  how  many header records to expect if -H is turned on
              [1].

       LABEL_FONT
              Font to use when plotting labels below axes. See ANNOT_FONT_PRI-
              MARY for available fonts [Helvetica].

       LABEL_FONT_SIZE
              Font size (> 0) for labels in points [24].

       LABEL_OFFSET
              Distance  from  base  of axis annotations to the top of the axis
              label [0.3c (or 0.1125i)].

       LINE_STEP
              Determines the maximum length (> 0) of individual straight line-
              segments when drawing arcuate lines [0.025c (or 0.01i)]

       MAP_SCALE_FACTOR
              Changes  the default map scale factor used for the Polar Stereo-
              graphic [0.9996], UTM [0.9996], and Transverse Mercator [1] pro-
              jections  in  order  to minimize areal distortion. Provide a new
              scale-factor or leave as default.

       MAP_SCALE_HEIGHT
              Sets the height (> 0) on the map of the map scale bars drawn  by
              various programs [0.2c (or 0.075i)].

       MEASURE_UNIT
              Sets  the  unit  length.  Choose between cm, inch, m, and point.
              [cm]. Note that, in GMT, one point is defined as 1/72 inch  (the
              PostScript  definition),  while  it  is often defined as 1/72.27
              inch in the typesetting industry. There is no universal  defini-
              tion.

       N_COPIES * (-c)
              Number of plot copies to make [1].

       OBLIQUE_ANNOTATION
              This  integer  is  a  sum of 6 bit flags (most of which only are
              relevant for oblique projections): If bit 1 is set (1),  annota-
              tions will occur wherever a gridline crosses the map boundaries,
              else longitudes will be annotated on the lower and upper  bound-
              aries  only,  and  latitudes  will  be annotated on the left and
              right boundaries only. If bit 2 is set (2), then longitude anno-
              tations  will be plotted horizontally. If bit 3 is set (4), then
              latitude annotations will be plotted horizontally.  If bit 4  is
              set  (8),  then oblique tickmarks are extended to give a projec-
              tion equal to the specified tick_length.  If bit 5 is set  (16),
              tickmarks will be drawn normal to the border regardless of grid-
              line angle.  If bit 6 is set  (32),  then  latitude  annotations
              will be plotted parallel to the border.  To set a combination of
              these, add up the values in parentheses. [1].

       OUTPUT_CLOCK_FORMAT
              Formatting template that indicates how an output clock string is
              to be formatted. This template is then used to guide the writing
              of clock strings in data fields. To use a floating point  format
              for  the  smallest  unit  (e.g. seconds), append .xxx, where the
              number of x indicates the  desired  precision.  If  no  floating
              point  is  indicated  then  the  smallest specified unit will be
              rounded off to nearest integer. For 12-hour clocks,  append  am,
              AM,  a.m.,  or  A.M.  (GMT will replace a|A with p|P for pm). If
              your template starts with a leading hyphen (-) then each integer
              item (y,m,d) will be printed without leading zeros (default uses
              fixed  width  formats).  As  examples,  try   hh:mm,   hh.mm.ss,
              hh:mm:ss.xxxx, hha.m., etc. [hh:mm:ss].

       OUTPUT_DATE_FORMAT
              Formatting  template that indicates how an output date string is
              to be formatted. This template is then used to guide the writing
              of date strings in data fields. You may specify either Gregorian
              calendar format or ISO week calendar format. Gregorian calendar:
              Use  any combination of yyyy (or yy for 2-digit years; if so see
              Y2K_OFFSET_YEAR), mm (or o for abbreviated  month  name  in  the
              current  time language), and dd, with or without delimiters. For
              day-of-year data, use jjj instead of mm and/or dd.  As examples,
              try  yy/mm/dd,  yyyy=jjj,  dd-o-yyyy, dd-mm-yy, yy-mm, etc.  ISO
              Calendar: Expected template is yyyy[-]W[-]ww[-]d,  where  ww  is
              ISO  week and d is ISO week day. Either template must be consis-
              tant, e.g., you cannot  specify  months  if  you  don’t  specify
              years.  As  examples,  try  yyyyWww,  yy-W-ww-d,  etc.  If  your
              template starts with a leading hyphen (-) then each integer item
              (y,m,d)  will  be  printed  without  leading zeros (default uses
              fixed width formats) [yyyy-mm-dd].

       OUTPUT_DEGREE_FORMAT
              Formatting template that indicates how  an  output  geographical
              coordinate  is  to  be  formatted. This template is then used to
              guide the writing of geographical coordinates  in  data  fields.
              The   template   is   in   general   of   the   form  [+|-]D  or
              [+|-]ddd[:mm[:ss]][.xxx][F]. The various terms have the  follow-
              ing purpose:

                      +|- + means output longitude in the 0 to 360 range
                              - means output longitude in the -360 to 0 range
                              If not given, use the -180 to +180 range
                      D Use D_FORMAT for floating point degrees.
                      ddd Fixed format integer degrees
                      : delimiter
                      mm Fixed format integer arc minutes
                      ss Fixed format integer arc seconds
                      .xxx  Floating fraction of previous integer field, fixed
              width.
                      F Encode sign using WESN suffix

              The default is +D.

       PAGE_COLOR
              Sets the color of the imaging background, i.e., the paper.  Give
              a  red/green/blue triplet, with each element in the 0-255 range.
              [255/255/255] (white).

       PAGE_ORIENTATION * (-P)
              Sets the orientation of the page. Choose portrait  or  landscape
              [landscape].

       PAPER_MEDIA
              Sets  the  physical  format  of the current plot paper [A4]. The
              following formats (and their widths and heights in  points)  are
              recognized (Additional site-specific formats may be specified in
              the  gmtmedia.d  file  in  $GMTHOME/share;  see  that  file  for
              details):

                      Media width height
                      A0 2380 3368
                      A1 1684 2380
                      A2 1190 1684
                      A3 842 1190
                      A4 595 842
                      A5 421 595
                      A6 297 421
                      A7 210 297
                      A8 148 210
                      A9 105 148
                      A10 74 105
                      B0 2836 4008
                      B1 2004 2836
                      B2 1418 2004
                      B3 1002 1418
                      B4 709 1002
                      B5 501 709
                      archA 648 864
                      archB 864 1296
                      archC 1296 1728
                      archD 1728 2592
                      archE 2592 3456
                      flsa 612 936
                      halfletter 396 612
                      note 540 720
                      letter 612 792
                      legal 612 1008
                      11x17 792 1224
                      ledger 1224 792

              For a completely custom format (e.g., for large format plotters)
              you may also specify Custom_WxH, where W and H  are  in  points.
              To  force the printer to request a manual paper feed, append ’-’
              to the media name, e.g., A3- will require the user to  insert  a
              A3  paper  into  the printer’s manual feed slot. To indicate you
              are making an EPS file, append ’+’ to the media name. Then,  GMT
              will attempt to issue a tight bounding box [Default Bounding Box
              is the paper dimension].

       PLOT_CLOCK_FORMAT
              Formatting template that indicates how an output clock string is
              to  be  plotted. This template is then used to guide the format-
              ting of clock strings in plot annotations. See OUTPUT_CLOCK_FOR-
              MAT for details. [hh:mm:ss].

       PLOT_DATE_FORMAT
              Formatting  template that indicates how an output date string is
              to be plotted. This template is then used to guide the  plotting
              of  date  strings  in  data  fields.  See OUTPUT_DATE_FORMAT for
              details. In addition, you may use a single o instead of  mm  (to
              plot month name) and u instead of W[-]ww to plot "Week ##". Both
              of these text strings will be affected by the TIME_LANGUAGE set-
              ting. [yyyy-mm-dd].

       PLOT_DEGREE_FORMAT
              Formatting  template  that  indicates how an output geographical
              coordinate is to be plotted. This template is then used to guide
              the  plotting  of  geographical  coordinates in data fields. See
              OUTPUT_DEGREE_FORMAT for details. In addition, you can append  A
              which plots the absolute value of the coordinate. The default is
              +ddd:mm:ss. Not all items may be plotted as this depends on  the
              annotation interval.

       PS_COLOR
              Determines whether PostScript output should use RGB or CMYK when
              specifying color. Select from rgb or cmyk [rgb].

       PSIMAGE_FORMAT
              Determines whether images created in PostScript should use  hex-
              adecimal  (i.e.,  ascii)  or  binary format. The latter takes up
              only half as much space and executes faster but may  choke  some
              printers,  especially  those off serial ports. Select hex or bin
              [hex].

       TICK_LENGTH
              The length of a tickmark. Normally, tickmarks are drawn  on  the
              outside of the map boundaries. To select interior tickmarks, use
              a negative tick_length [0.2c (or 0.075i)].

       TICK_PEN
              The pen thickness to be used  for  tickmarks  in  dpi  units  or
              points (append p) [0.5p].

       TIME_FORMAT_PRIMARY
              Controls  how  primary month-, week-, and weekday-names are for-
              matted. Choose among full, abbreviated, and  character.  If  the
              leading  f,  a,  or  c  are replaced with F, A, and C the entire
              annotation will be in upper case.

       TIME_FORMAT_SECONDARY
              Controls how secondary month-, week-, and weekday-names are for-
              matted.  Choose  among  full, abbreviated, and character. If the
              leading f, a, or c are replaced with F,  A,  and  C  the  entire
              annotation will be in upper case.

       TIME_EPOCH
              This  parameter is active only when TIME_SYSTEM is set to OTHER.
              It is a string of the form  yyyy-mm-ddThh:mm:ss  (Gregorian)  or
              yyyy-Www-ddThh:mm:ss  (ISO) indicating the value of the calendar
              and clock at the origin (zero point) of relative time units.

       TIME_IS_INTERVAL
              Used when input calendar data should be truncated  and  adjusted
              to the middle of the relevant interval. In the following discus-
              sion, the unit u can be one of these  time  units:  (y  year,  o
              month,  u  ISO  week,  d  day,  h hour, m minute, and c second).
              TIME_IS_INTERVAL can have any of the following three values:  1.
              OFF  [Default]. No adjustment, time is decoded as given. 2. +nu.
              Activate interval adjustment for input by truncate  to  previous
              whole  number  of  n units and then center time on the following
              interval. 3. -nu. Same, but center time on the  previous  inter-
              val.  For  example,  with  TIME_IS_INTERVAL = +1o, an input data
              string   like   1999-12   will   be    interpreted    to    mean
              1999-12-15T12:00:00.0  (exactly  middle  of  December), while if
              TIME_IS_INTERVAL = OFF then that date  is  interpreted  to  mean
              1999-12-1T00:00:00.0 (start of December).

       TIME_INTERVAL_FRACTION
              Determines  if partial intervals at the start and end of an axis
              should be annotated.  If  the  range  of  the  partial  interval
              exceeds  the specified fraction of the normal interval stride we
              will place the  annotation  centered  on  the  partial  interval
              [0.5].

       TIME_LANGUAGE
              Language  to use when plotting calendar items such as months and
              days. Select from:
                      BR Brazilian Portuguese
                      CN1 Simplified Chinese
                      CN2 Traditional Chinese
                      DE German
                      DK Danish
                      EH Basque
                      ES Spanish
                      FI Finnish
                      FR French
                      GR Greek
                      HU Hungarian
                      IE Irish
                      IL Hebrew
                      IT Italian
                      JP Japanese
                      NL Dutch
                      NO Norwegian
                      PL Polish
                      PT Portuguese
                      RU Russian
                      SE Swedish
                      TO Tongan
                      TR Turkish
                      UK British English
                      US US English

              If  your  language  is  not  supported,   please   examine   the
              $GMTHOME/share/time/us.d  file  and  make a similar file. Please
              submit it to the GMT Developers for official inclusion.

       TIME_SYSTEM
              Determines what the time epoch relative time refers to and  what
              the  units  are.  Choose  from  one  of the preset systems below
              (epoch and units are indicated):
                      JD Julian Date, -4713-11-25T12:00:00 d
                      MJD Modified Julian Date, 1858-11-27T00:00:00 d
                      J2000 2000-01-01T00:00:00 d
                      S1985 1985-01-01T00:00:00 c
                      UNIX 1970-01-01T00:00:00 c
              or specify OTHER and supply your own  TIME_EPOCH  and  TIME_UNIT
              settings [J2000].

       TIME_UNIT
              This  parameter is active only when TIME_SYSTEM is set to OTHER,
              and specifies the units of relative time data. Choose y  (year),
              d (day), h (hour), m (minute), or c (second).

       TIME_WEEK_START
              When weeks are indicated on time axes, this parameter determines
              the first day of the week  for  Gregorian  calendars.  (The  ISO
              weekly  calendar  always begins weeks with Monday.)  [Monday (or
              Sunday)].

       UNIX_TIME * (-U)
              Specifies if a UNIX system time stamp should be plotted  at  the
              lower left corner of the plot [FALSE].

       UNIX_TIME_POS * (-U)
              Sets the position of the UNIX time stamp relative to the current
              plots lower left corner [-2c/-2c (or -0.75i/-0.75i)].

       VECTOR_SHAPE
              Determines the shape of the head of a  vector.  Normally  (i.e.,
              for  vector_shape  = 0), the head will be triangular, but can be
              changed to an arrow (1). Intermediate settings  gives  something
              in between [0].

       VERBOSE * (-V)
              Determines  if  GMT programs should display run-time information
              or run silently [FALSE].

       X_AXIS_LENGTH
              Sets the default length (> 0) of the x-axis [25c (or 9i)].

       Y_AXIS_LENGTH
              Sets the default length (> 0) of the y-axis [15c (or 6i)].

       X_ORIGIN * (-X)
              Sets the x-coordinate of the origin on the paper for a new  plot
              [2.5c (or 1i)].  For an overlay, the default offset is 0.

       Y_ORIGIN * (-Y)
              Sets  the y-coordinate of the origin on the paper for a new plot
              [2.5c (or 1i)].  For an overlay, the default offset is 0.

       Y2K_OFFSET_YEAR
              When 2-digit years are used to represent 4-digit years (see var-
              ious  DATE_FORMATs),  Y2K_OFFSET_YEAR  gives the first year in a
              100-year sequence. For example, if Y2K_OFFSET_YEAR is 1729, then
              numbers  29  through  99  correspond to 1729 through 1799, while
              numbers 00 through 28 correspond to 1800 through 1828. [1950].

       XY_TOGGLE * (-:)
              Set if the first two columns of input and output  files  contain
              (latitude,longitude)  or  (y,x) rather than the expected (longi-
              tude,latitude) or (x,y). FALSE means we have (x,y) both on input
              and output. TRUE means both input and output should be (y,x). IN
              means only input has (y,x), while OUT means only  output  should
              be (y,x). [FALSE].

       Y_AXIS_TYPE
              Determines  if  the annotations for a y-axis (for linear projec-
              tions) should be plotted horizontally (hor_text)  or  vertically
              (ver_text) [hor_text].


EXAMPLES

       To get a copy of the GMT parameter defaults in your home directory, run

       gmtdefaults -D > ~/.gmtdefaults4

       You may now change the settings by editing this file using a text  edi-
       tor of your choice, or use gmtset to change specified parameters on the
       command line.


BUGS

       If you have typographical errors in your .gmtdefaults4 file(s), a warn-
       ing  message  will  be  issued,  and  the GMT defaults for the affected
       parameters will be used.


SEE ALSO

       gmt(l), gmtset(l)



GMT4.0                            1 Oct 2004                    GMTDEFAULTS(l)

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