GMT  -  The  Generic Mapping Tools data processing and display software


       GMT is a collection of public-domain Unix  tools  that  allows  you  to
       manipulate x,y and x,y,z data sets (filtering, trend fitting, gridding,
       projecting, etc.)  and produce PostScript  illustrations  ranging  from
       simple  x-y  plots,  via contour maps, to artificially illuminated sur-
       faces and 3-d perspective views in black/white or 24bit color.  Linear,
       log10, and power scaling is supported in addition to 25 common map pro-
       jections. The processing and display routines within GMT are completely
       general and will handle any (x,y) or (x,y,z) data as input.


       GMT is also a wrapper script that can start any of the programs:

       GMT module module-options

       where  module  is  the  name of a GMT program and the options are those
       that pertain to that particular program.


               The following is a summary of all the  programs  supplied  with
       GMT and a very short description of their purpose. Detailed information
       about each program can be found in the separate manual pages.

       blockmean L2 (x,y,z) data filter/decimator
       blockmedian L1 (x,y,z) data filter/decimator
       blockmode Mode (x,y,z) data filter/decimator
       filter1d Filter 1-D data sets (time series)
       fitcircle Finds the best-fitting great circle to a set
                               of points
       gmt2rgb Convert Sun rasterfile or grid to r, g, b
       gmtconvert Convert between ASCII and binary 1-D tables
       gmtdefaults List the current default settings
       gmtmath Mathematical operations on data tables
       gmtset Set individual default parameters
       gmtselect Extract data subsets based on spatial
       grdfilter Filter 2-D data sets in the space domain
       grd2cpt Make a color palette table from a grdfile
       grd2xyz Conversion from 2-D gridded file to table
       grdblend Blend several partially over-lapping grdfiles
                               onto one grid
       grdclip Limit the z-range in gridded data
       grdcontour Contouring of 2-D gridded data
       grdcut Cut a sub-region from a grd file
       grdedit Modify header information in a 2-D gridded
       grdfft Operate on grdfiles in the frequency domain
       grdgradient Compute directional gradient from grdfiles
       grdhisteq Histogram equalization for grdfiles
       grdimage Produce images from 2-D gridded data
       grdinfo Get information about grd files
       grdlandmask Create mask grdfile from shoreline data base
       grdmask Reset nodes outside a clip path to a constant
       grdmath Mathematical operations on grdfiles
       grdpaste Paste together grdfiles along a common edge
       grdproject Project gridded data onto a new coordinate
       grdreformat Converting between different grdfile formats
       grdsample Resample a 2-D gridded data set onto a new
       grdtrend Fits polynomial trends to grdfiles
       grdtrack Sampling of 2-D data set along 1-D track
       grdvector Plot vector fields from grdfiles
       grdview 3-D perspective imaging of 2-D gridded data
       grdvolume Volume calculations from 2-D gridded data
       makecpt Make GMT color palette tables
       mapproject Forward or inverse map projections of table
       minmax Find extreme values in data tables
       nearneighbor Nearest-neighbor gridding scheme
       project Project data onto lines/great circles
       psbasemap Create a basemap plot
       psclip Use polygon files to define clipping paths
       pscoast Plot coastlines and filled continents on maps
       pscontour Contour xyz-data by triangulation
       pshistogram Plot a histogram
       psimage Plot images (Sun rasterfiles) on maps
       pslegend Plot legend on maps
       psmask Create overlay to mask out regions on maps
       psrose Plot sector or rose diagrams
       psscale Plot grayscale or colorscale on maps
       pstext Plot textstrings on maps
       pswiggle Draw time-series along track on maps
       psxy Plot symbols, polygons, and lines on maps
       psxyz Plot symbols, polygons, and lines in 3-D
       sample1d Resampling of 1-D table data sets
       spectrum1d Compute various spectral estimates from time-
       splitxyz Split xyz-files into several segments
       surface A continuous curvature gridding algorithm
       trend1d Fits polynomial or Fourier trends to y = f(x)
       trend2d Fits polynomial trends to z = f(x,y) data
       triangulate Perform optimal Delaunay triangulation and
       xyz2grd Convert equidistant xyz data to a 2-D grd


       Look up the individual man pages for details. By default,  these  pages
       are  in  $GMTHOME/man/manl,  depending  on  your installation settings.
       Information is also available on the GMT home page
       or locally under $GMTHOME/www/gmt/gmt_services.html


       Wessel,  P.,  and W. H. F. Smith, 2004, The Generic Mapping Tools (GMT)
       version 4 Technical Reference & Cookbook, SOEST/NOAA.
       Wessel, P., and W. H. F. Smith, 1998, New, Improved Version of  Generic
       Mapping Tools Released, EOS Trans., AGU, 79 (47), p. 579.
       Wessel,  P.,  and W. H. F. Smith, 1995, New Version of the Generic Map-
       ping Tools Released, EOS Trans., AGU, 76 (33), p. 329.
       Wessel, P., and W. H. F. Smith, 1995, New Version of the  Generic  Map-
       ping Tools Released, http: American Geophysical Union.
       Wessel,  P., and W. H. F. Smith, 1991, Free Software Helps Map and Dis-
       play Data, EOS Trans., AGU, 72 (41), p. 441.

GMT4.0                            1 Oct 2004                            GMT(l)

Man(1) output converted with man2html