GMT(1) Generic Mapping Tools GMT(1)NAMEGMT - The Generic Mapping Tools data processing and display software
package
INTRODUCTIONGMT 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 full color. Linear,
log10, and power scaling is supported in addition to 25 common map pro‐
jections. The processing and display routines within GMT are com‐
pletely general and will handle any (x,y) or (x,y,z) data as input.
SYNOPSISGMT 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.
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.
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 grids
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 criteria
grdfilter Filter 2-D data sets in the space domain
grd2cpt Make a color palette table from grid files
grd2xyz Conversion from 2-D grid file to table data
grdblend Blend several partially over-lapping grid files 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 grid file
grdedit Modify header information in a 2-D grid file
grdfft Operate on grid files in the wavenumber (or frequency)
domain
grdgradient Compute directional gradient from grid files
grdhisteq Histogram equalization for grid files
grdimage Produce images from 2-D gridded data
grdinfo Get information about grid files
grdlandmask Create mask grid file from shoreline data base
grdmask Reset nodes outside a clip path to a constant
grdmath Mathematical operations on grid files
grdpaste Paste together grid files along a common edge
grdproject Project gridded data onto a new coordinate system
grdreformat Converting between different grid file formats
grdsample Resample a 2-D gridded data set onto a new grid
grdtrend Fits polynomial trends to grid files
grdtrack Sampling of 2-D data set along 1-D track
grdvector Plot vector fields from grid files
grdview 3-D perspective imaging of 2-D gridded data
grdvolume Volume calculations from 2-D gridded data
greenspline Interpolation using Green's functions for splines in 1-3
dimensions
makecpt Make color palette tables
mapproject Forward or inverse map projections of table data
minmax Find extreme values in data tables
nearneighbor Nearest-neighbor gridding scheme
project Project data onto lines/great circles
ps2raster Crop and convert PostScript files to raster images, EPS,
and PDF
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 (EPS or Sun raster files) on maps
pslegend Plot legend on maps
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 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-series
splitxyz Split xyz-files into several segments
surface A continuous curvature gridding algorithm
trend1d Fits polynomial or Fourier trends to y = f(x) data
trend2d Fits polynomial trends to z = f(x,y) data
triangulate Perform optimal Delaunay triangulation and gridding
xyz2grd Convert equidistant xyz data to a 2-D grid file
SEE ALSO
Look up the individual man pages for more details and full syntax. Run
GMT without options to list all GMT programs and to show all installa‐
tion directories. Information is also available on the GMT home page
gmt.soest.hawaii.edu
REFERENCES
Wessel, P., and W. H. F. Smith, 2015, The Generic Mapping Tools (GMT)
version 4.5.14 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://www.agu.org/eos_elec/95154e.html, Copyright
1995 by the 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.
GMT 4.5.14 1 Nov 2015 GMT(1)
