Module Purpose

  Filtering of 1-D and 2-D Data
blockmean L_2 (x,y,z) table data filter/decimator
blockmedian L_1 (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
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 y = f(x) series
trend2d Fits polynomial trends to z = f(x,y) 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