1GMT(1)                       Generic Mapping Tools                      GMT(1)
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NAME

6       GMT  -  The  Generic Mapping Tools data processing and display software
7       package
8

INTRODUCTION

10       GMT is a collection of public-domain Unix  tools  that  allows  you  to
11       manipulate x,y and x,y,z data sets (filtering, trend fitting, gridding,
12       projecting, etc.)  and produce PostScript  illustrations  ranging  from
13       simple  x-y  plots,  via contour maps, to artificially illuminated sur‐
14       faces and 3-D perspective views in black/white or full color.   Linear,
15       log10, and power scaling is supported in addition to 25 common map pro‐
16       jections.  The processing and display  routines  within  GMT  are  com‐
17       pletely general and will handle any (x,y) or (x,y,z) data as input.
18

SYNOPSIS

20       GMT is also a wrapper script that can start any of the programs:
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22       GMT module module-options
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24       where  module  is  the  name of a GMT program and the options are those
25       that pertain to that particular program.
26

GMT OVERVIEW

28       The following is a summary of all the programs supplied with GMT and  a
29       very  short  description  of  their purpose. Detailed information about
30       each program can be found in the separate manual pages.
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32       blockmean      L2 (x,y,z) data filter/decimator
33       blockmedian    L1 (x,y,z) data filter/decimator
34       blockmode      Mode (x,y,z) data filter/decimator
35       filter1d       Filter 1-D data sets (time series)
36       fitcircle      Finds the best-fitting great circle to a set of points
37       gmt2rgb        Convert Sun rasterfile or grid to r, g, b grids
38       gmtconvert     Convert between ASCII and binary 1-D tables
39       gmtdefaults    List the current default settings
40       gmtmath        Mathematical operations on data tables
41       gmtset         Set individual default parameters
42       gmtselect      Extract data subsets based on spatial criteria
43       grdfilter      Filter 2-D data sets in the space domain
44       grd2cpt        Make a color palette table from grid files
45       grd2xyz        Conversion from 2-D grid file to table data
46       grdblend       Blend several partially over-lapping grid files onto one
47       grid
48       grdclip        Limit the z-range in gridded data
49       grdcontour     Contouring of 2-D gridded data
50       grdcut         Cut a sub-region from a grid file
51       grdedit        Modify header information in a 2-D grid file
52       grdfft         Operate  on  grid files in the wavenumber (or frequency)
53       domain
54       grdgradient    Compute directional gradient from grid files
55       grdhisteq      Histogram equalization for grid files
56       grdimage       Produce images from 2-D gridded data
57       grdinfo        Get information about grid files
58       grdlandmask    Create mask grid file from shoreline data base
59       grdmask        Reset nodes outside a clip path to a constant
60       grdmath        Mathematical operations on grid files
61       grdpaste       Paste together grid files along a common edge
62       grdproject     Project gridded data onto a new coordinate system
63       grdreformat    Converting between different grid file formats
64       grdsample      Resample a 2-D gridded data set onto a new grid
65       grdtrend       Fits polynomial trends to grid files
66       grdtrack       Sampling of 2-D data set along 1-D track
67       grdvector      Plot vector fields from grid files
68       grdview        3-D perspective imaging of 2-D gridded data
69       grdvolume      Volume calculations from 2-D gridded data
70       greenspline    Interpolation using Green's functions for splines in 1-3
71       dimensions
72       makecpt        Make color palette tables
73       mapproject     Forward or inverse map projections of table data
74       minmax         Find extreme values in data tables
75       nearneighbor   Nearest-neighbor gridding scheme
76       project        Project data onto lines/great circles
77       ps2raster      Crop and convert PostScript files to raster images, EPS,
78       and PDF
79       psbasemap      Create a basemap plot
80       psclip         Use polygon files to define clipping paths
81       pscoast        Plot coastlines and filled continents on maps
82       pscontour      Contour xyz-data by triangulation
83       pshistogram    Plot a histogram
84       psimage        Plot images (EPS or Sun raster files) on maps
85       pslegend       Plot legend on maps
86       psmask         Create overlay to mask out regions on maps
87       psrose         Plot sector or rose diagrams
88       psscale        Plot gray scale or color scale on maps
89       pstext         Plot text strings on maps
90       pswiggle       Draw time-series along track on maps
91       psxy           Plot symbols, polygons, and lines on maps
92       psxyz          Plot symbols, polygons, and lines in 3-D
93       sample1d       Resampling of 1-D table data sets
94       spectrum1d     Compute various spectral estimates from time-series
95       splitxyz       Split xyz-files into several segments
96       surface        A continuous curvature gridding algorithm
97       trend1d        Fits polynomial or Fourier trends to y = f(x) data
98       trend2d        Fits polynomial trends to z = f(x,y) data
99       triangulate    Perform optimal Delaunay triangulation and gridding
100       xyz2grd        Convert equidistant xyz data to a 2-D grid file
101

SEE ALSO

103       Look up the individual man pages for more details and full syntax.  Run
104       GMT  without options to list all GMT programs and to show all installa‐
105       tion directories.  Information is also available on the GMT  home  page
106       gmt.soest.hawaii.edu
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REFERENCES

109       Wessel,  P.,  and W. H. F. Smith, 2009, The Generic Mapping Tools (GMT)
110       version 4.5.0 Technical Reference & Cookbook, SOEST/NOAA.
111       Wessel, P., and W. H. F. Smith, 1998, New, Improved Version of  Generic
112       Mapping Tools Released, EOS Trans., AGU, 79 (47), p. 579.
113       Wessel,  P.,  and W. H. F. Smith, 1995, New Version of the Generic Map‐
114       ping Tools Released, EOS Trans., AGU, 76 (33), p. 329.
115       Wessel, P., and W. H. F. Smith, 1995, New Version of the  Generic  Map‐
116       ping Tools Released, http://www.agu.org/eos_elec/95154e.html, Copyright
117       1995 by the American Geophysical Union.
118       Wessel, P., and W. H. F. Smith, 1991, Free Software Helps Map and  Dis‐
119       play Data, EOS Trans., AGU, 72 (41), p. 441.
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123GMT 4.5.6                         10 Mar 2011                           GMT(1)
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