.TH GMT l DATE
.SH NAME
gmt \- The Generic Mapping Tools data processing and display software package
.SH INTRODUCTION
\fBGMT\fP 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 \fIPostScript\fP illustrations ranging from simple x-y plots, via
contour maps, to artificially illuminated surfaces and 3-d perspective
views in black/white or 24bit color.  Linear, log10, and power scaling is supported in
additon to 20 common map projections.  The processing and display routines within GMT
are completely general and will handle any (x,y) or (x,y,z) data as input.
.SH GMT OVERVIEW
	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.
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.sp
	blockmean		L2 (x,y,z) data filter/decimator
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	blockmedian		L1 (x,y,z) data filter/decimator
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	filter1d			Filter 1-D data sets (time series)
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	fitcircle			Finds the best-fitting great circle for a set of points
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	gmtdefaults		List the current default settings
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	grdfilter			Filter 2-D data sets in the space domain
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	grd2cpt			Make a color palette table from a grdfile
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	grd2xyz			Conversion from 2-D gridded file to ASCII listing
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	grdclip			Limit the z-range in gridded data sets
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	grdcontour		Contouring of 2-D gridded data sets
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	grdcut			Cut a sub-region from a grd file
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	grdedit			Modify header information in a 2-D gridded file
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	grdfft			Perform operations on grdfiles in the frequency domain
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	grdgradient		Compute directional gradient from grdfiles
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	grdhisteq		Histogram equalization for grdfiles
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	grdimage		Produce images from 2-D gridded data sets
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	grdinfo			Get information about grd files
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	grdlandmask		Create mask grdfile from shoreline data base
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	grdmask			Reset nodes outside a clip path to a constant
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	grdmath			Mathematical operations on grdfiles
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	grdpaste			Paste together grdfiles along a common edge
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	grdproject		Project gridded data sets onto a new coordinate system
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	grdreformat		Converting between different grdfile formats
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	grdsample		Resample a 2-D gridded data set onto a new grid
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	grdtrend			Fits polynomial trends to grdfiles
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	grdtrack			Sampling of 2-D data set along 1-D track
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	grdvector		Plot vector fields from grdfiles
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	grdview			3-D perspective imaging of 2-D gridded data sets
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	makecpt			Make GMT color palette tables
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	mapproject		Transformation of coordinate systems for ASCII data
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	minmax			Find extreme values in ASCII tables
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	nearneighbor		Nearest-neighbor gridding scheme
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	project			Project data onto lines/great circles
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	psbasemap		Create a basemap plot
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	psclip			Use polygon files to define clipping paths
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	pscoast			Plot coastlines and filled continents on maps
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	pscontour		Contour xyz-data by triangulation
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	pshistogram		Plot a histogram
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	psmask			Create overlay to mask out regions on maps
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	psmegaplot		Create postersize plots from postscript files
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	psrose			Plot sector or rose diagrams
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	psscale			Plot grayscale or colorscale on maps
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	pstext			Plot textstrings on maps
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	pswiggle		Draw time-series along track on maps
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	psxy			Plot symbols, polygons, and lines on maps
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	psxyz			Plot symbols, polygons, and lines in 3-D
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	sample1d		Resampling of 1-D ASCII data sets
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	spectrum1d		Compute various spectral estimates from time-series
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	splitxyz			Split xyz-files into several segments
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	surface			A continuous curvature gridding algorithm
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	trend1d			Fits polynomial trends to y = f(x) series
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	trend2d			Fits polynomial trends to z = f(x,y) series
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	triangulate		Perform optimal Delaunay triangulation and gridding
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	xyz2grd			Convert an equidistant ASCII xyz file to a 2-D grd file
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.SH SEE ALSO
Look up the individual man pages for details.
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Some information is also avaiable on the GMT Word Wide Web home page
(http:www.soest.hawaii.edu/soest/gmt.html)
#include "refs.i"
