Module Purpose

	Filtering of 1-D and 2-D Data
blockmean	L (x,y,z) table data filter/decimator
blockmedian	L (x,y,z) table data filter/decimator
blockmode	Mode estimate (x,y,z) table data filter/decimator
filter1d	Time domain filtering of 1-D data tables
grdfilter	Filter 2-D gridded data sets in the space domain
	Plotting of 1-D and 2-D Data
gmtlogo	Plot the GMT logo on maps
grdcontour	Contouring of 2-D gridded data sets
grdimage	Produce images from 2-D gridded data sets
grdvector	Plotting of 2-D gridded vector fields
grdview	3-D perspective imaging of 2-D gridded data sets
psbasemap	Create a basemap plot
psclip	Use polygon files to define clipping paths
pscoast	Plot (and fill) coastlines, borders, and rivers on maps
pscontour	Contour or image raw table data by triangulation
pshistogram	Plot a histogram
psimage	Plot Sun raster files on a map
pslegend	Plot a legend on a map
psmask	Create overlay to mask out regions on maps
psrose	Plot sector or rose diagrams
psscale	Plot gray scale or color scale on maps
psternary	Plot data on ternary diagrams
pstext	Plot text strings on maps
pswiggle	Draw table data time-series along track on maps
psxy	Plot symbols, polygons, and lines on maps
psxyz	Plot symbols, polygons, and lines in 3-D
	Gridding of Data Tables
greenspline	Interpolation with Green's functions for splines in 1--3 D
nearneighbor	Nearest-neighbor gridding scheme
sphinterpolate	Spherical gridding in tension of data on a sphere
surface	A continuous curvature gridding algorithm
triangulate	Perform optimal Delauney triangulation and gridding
	Sampling of 1-D and 2-D Data
gmtsimplify	Line reduction using the Douglas-Peucker algorithm
grdsample	Resample a 2-D gridded data set onto a new grid
grdtrack	Sample 2-D gridded data sets at specified (x,y) locations
sample1d	Resampling of 1-D table data sets
	Projection and Map-transformation
grdproject	Project gridded data sets onto a new coordinate system
mapproject	Transformation of coordinate systems for table data
project	Project table data onto lines or great circles
	Retrieve Information
gmtdefaults	List the current default settings
gmtget	Retrieve selected parameters in current file
gmtinfo	Get information about table data files
gmtset	Change selected parameters in current file
grdinfo	Get information about grid files
	Mathematical Operations on Tables or Grids
gmtmath	Mathematical operations on table data
makecpt	Make color palette tables
spectrum1d	Compute various spectral estimates from time-series
sph2grd	Compute grid from spherical harmonic coefficients
sphdistance	Create grid of NN or distances to nearest points on a sphere
sphtriangulate	Delaunay or Voronoi construction of spherical (lon,lat) data
	Convert or Extract Subsets of Data
gmtconnect	Connect segments into more complete lines or polygons
gmtconvert	Convert data tables from one format to another
gmtselect	Select subsets of table data based on multiple spatial criteria
gmtspatial	Geospatial operations on lines and polygons
gmtvector	Operations on Cartesian vectors in 2-D and 3-D
grd2rgb	Convert Sun raster or grid file to red, green, blue component grids
grd2xyz	Conversion from 2-D grid file to table data
grdblend	Blend several partially over-lapping grid files onto one grid
grdconvert	Converts grid files into other grid formats
grdcut	Cut a sub-region from a grid file
grdpaste	Paste together grid files along a common edge
splitxyz	Split xyz files into several segments
xyz2grd	Convert an equidistant table xyz file to a 2-D grid file
	Determine Trends in 1-D and 2-D Data
fitcircle	Finds the best-fitting great or small circle for a set of points
gmtregress	Linear regression of 1-D data sets
grdtrack	Sample 2-D gridded data sets at specified (x,y) locations
trend1d	Fits polynomial or Fourier trends to series
trend2d	Fits polynomial trends to series
	Other Operations on 2-D Grids
grd2cpt	Make color palette table from a grid files
grdclip	Limit the z-range in gridded data sets
grdedit	Modify header information in a 2-D grid file
grdfft	Perform operations on grid files in the frequency domain
grdgradient	Compute directional gradient from grid files
grdhisteq	Histogram equalization for grid files
grdlandmask	Create masking grid files from shoreline data base
grdmask	Reset grid nodes in/outside a clip path to constants
grdmath	Mathematical operations on grid files
grdvolume	Calculate volumes under a surface within specified contour
	Miscellaneous Tools
gmt2kml	Like psxy but plots KML for use in Google Earth
kml2gmt	Extracts coordinates from Google Earth KML files
psconvert	Crop and convert PostScript files to raster images, EPS, and PDF