- ANOT_MIN_ANGLE
- If the angle
between the map boundary and the annotation baseline is less than this
minimum value (in degrees), the annotation is not plotted (this may occur
for certain oblique projections.) Give a value in the range 0-90. [20]
- ANOT_MIN_SPACING
- If an annotation would be plotted less than this minimum distance from
its closest neighbor, the annotation is not plotted (this may occur for
certain oblique projections.) [0]
- ANOT_FONT
- Font used for tick mark 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
- ANOT_FONT_SIZE
- Font size (> 0) in points for map annotations. [14]
- ANOT_OFFSET
- Distance from end of tickmark to start of annotation [0.2c (or 0.075i)].
A negative offset will place the anotation inside the map border.
- 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) [fancy]. For some map projections (e.g., Oblique Mercator), plain
is the only option even if fancy is set as default.
- 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 = 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 syntax) to be used when printing
double precision floating point numbers If it is NOT a ’g’-type format (as
the default is), the format is used directly in anotations. [%lg].
- DEGREE_FORMAT
- Output format to be used when annotating map boundaries. Choose between
six formats:
0 Longitudes go from 0 to 360, latitudes from -90 to 90 [Default].
1 Longitudes go from -180 to 180, latitudes from -90 to 90.
2 Longitudes are unsigned 0 to 180, latitudes unsigned 0 to 90.
3 Same as 2, but with letters W, E, S, or N appended as appropriate.
4 Same as 0, with decimal degrees instead of degrees, minutes, and seconds.
5 Same as 1, with decimal degrees instead of degrees, minutes, and seconds.
Add 10 to these values to use the large degree symbol character (octal
217) [Default is the small degree symbol (octal 312)].
- 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 output 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 projections [WGS-84]. Choose among
WGS-84 1984 World Geodetic System
GRS-80 1980 International Geodetic Reference System
WGS-72 1972 World Geodetic System
WGS-66 1966 World Geodetic System
Australian 1965 Used down under
Krassovsky 1940 Used in the Soviet Union
International 1924 Worldwide use
Hayford-1909 1909 Same as the International 1924
Clarke-1880 1880 Most of Africa, France
Clarke-1866 1866 North America, the Phillipines
Airy 1830 Great Britain
Bessel 1841 Central Europe, Chile, Indonesia
Everest 1830 India, Burma, Pakistan, Afghanistan, Thailand, etc.
Sphere 1980 The mean radius in GRS-80 (for spherical/plate tectonics 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 this name as a file and read the ellipsoid name,
year, major-axis (in m), minor-axis (in m), and flattening 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.
- FRAME_PEN
- Thickness of pen used to draw plain map frame in dpi units or
points (append p) [5].
- 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 plotting. 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
- Size (>= 0) of grid cross at lon-lat intersections.
0 means draw continuous gridlines instead [0].
- GRID_PEN
- Pen thickness used
to draw grid lines in dpi units or points (append p) [1].
- 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 expansion is done [FALSE].
- HEADER_FONT
- Font to use
when plotting headers. See ANOT_FONT for available fonts [Helvetica].
- HEADER_FONT_SIZE
- Font size (> 0) for header in points [36].
- 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].
- INTERPOLANT
- Determines if linear (linear), Akima’s spline (akima),
or natural 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 ANOT_FONT for available fonts
[Helvetica].
- LABEL_FONT_SIZE
- Font size (> 0) for labels in points [24].
- LINE_STEP
- Determines the maximum length (> 0) of individual straight line-segments
when drawing arcuate lines [0.025c (or 0.01i)]
- MAP_SCALE_FACTOR
- Sets the
central scale factor (> 0) used for the Polar Stereographic and Transverse
Mercator projections. Typically, it is set to 0.9996 to minimize areal distortion
[0.9996].
- MAP_SCALE_HEIGHT
- Sets the height (> 0) on the map of the map scalebars
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
definition.
- N_COPIES * (-c)
- Number of plot copies to make [1].
- OBLIQUE_ANOTATION
- This integer is a sum of 5 bit flags (most of which only are relevant for
oblique projections): If bit 1 is set (1)
, annotations will occur wherever
a gridline crosses the map boundaries, else longitudes will be annotated
on the lower and upper boundaries only, and latitudes will be annotated
on the left and right boundaries only. If bit 2 is set (2)
, then longitude
anotations will be plotted horizontally. If bit 3 is set (4)
, then latitude
anotations will be plotted horizontally. If bit 4 is set (8)
, then oblique
tickmarks are extended to give a projection equal to the specified tick_length.
If bit 5 is set (16), tickmarks will be drawn normal to the border regardless
of gridline angle. To set a combination of these, add up the values in parentheses.
[1].
- 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
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
is the paper dimension].
- PSIMAGE_FORMAT
- Determines whether images created
in PostScript should use hexadecimal (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) [2].
- 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].
- WANT_EURO_FONT
- Determines if GMT PostScript
output should include font re-encoding for accented European characters.
See Cookbook section 4.16 and Appendix H for details [TRUE].
- 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.
- XY_TOGGLE * (-:)
- Set if the first two columns of
input files contain (latitude,longitude) or (y,x) rather than the expected
(longitude,latitude) or (x,y) [FALSE].
- Y_AXIS_TYPE
- Determines if the annotations
for a y-axis (for linear projections) should be plotted horizontally (hor_text)
or vertically (ver_text) [hor_text].
You may now change the settings by editing this file using a text editor
of your choice, or use gmtset to change specified parameters on the command
line.