GMT Online Man Pages

These man pages are html-versions of the Unix man pages for GMT. They are grouped by function. For an alphabetical order, click here.

Thematic listing of GMT Unix man pages

FILTERING OF 1-D AND 2-D DATA:

blockmean L2 (x,y,z) data filter/decimator
blockmedian L1 (x,y,z) data filter/decimator
blockmode Mode-estimating (x,y,z) data filter/decimator
filter1d Filter 1-D data (time series)
grdfilter Filter 2-D data in space domain

PLOTTING OF 1-D and 2-D DATA:

grdcontour Contouring of 2-D gridded data
grdimage Produce images from 2-D gridded datar
grdvector Plot vector fields from 2-D gridded data
grdview 3-D perspective imaging of 2-D gridded data
psbasemap Create a basemap frame
psclip Use polygon files as clipping paths
pscoast Plot coastlines, filled continents, rivers, and political borders
pscontour Direct contouring or imaging of xyz-data by triangulation
pshistogram Plot a histogram
psimage Plot Sun rasterfiles on a map
psmask Create overlay to mask specified regions of a map
psrose Plot sector or rose diagrams
psscale Plot grayscale or colorscale
pstext Plot textstrings
pswiggle Draw anomalies along track
psxy Plot symbols, polygons, and lines in 2-D
psxyz Plot symbols, polygons, and lines in 3-D

GRIDDING OF (X,Y,Z) DATA:

nearneighbor Nearest-neighbor gridding scheme
surface Continuous curvature gridding algorithm
triangulate Perform optimal Delauney triangulation on xyz data

SAMPLING OF 1-D AND 2-D DATA:

grdsample Resample a 2-D gridded data onto new grid
grdtrack Sampling of 2-D data along 1-D track
sample1d Resampling of 1-D data

PROJECTION AND MAP-TRANSFORMATION:

grdproject Project gridded data onto new coordinate system
mapproject Transformation of coordinate systems
project Project data onto lines/great circles

INFORMATION:

gmtdefaults List the current default settings
gmtset Edit parameters in the .gmtdefaults file
grdinfo Get information about grd files
minmax Report extreme values in table datafiles

CONVERT OR EXTRACT SUBSETS OF DATA:

gmtconvert Convert table data from one format to another
gmtmath Reverse Polish calculator for table data
gmtselect Select table subsets based on multiple spatial criteria
grd2xyz Convert 2-D gridded data to table
grdcut Cut a sub-region from a grd file
grdpaste Paste together grdfiles along common edge
grdreformat Convert from one grdformat to another
splitxyz Split xyz files into several segments
xyz2grd Convert table to 2-D grd file

MISCELLANEOUS:

makecpt Create GMT color palette tables
spectrum1d Compute spectral estimates from time-series
triangulate Perform optimal Delauney triangulation on xyz data

DETERMINE TRENDS IN 1-D AND 2-D DATA:

fitcircle Finds best-fitting great or small circles
grdtrend Fits polynomial trends to grdfiles (z = f(x,y))
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 grdfile
grdclip Limit the z-range in gridded data sets
grdedit Modify grd header information
grdfft Operate on grdfiles in frequency domain
grdgradient Compute directional gradient from grdfiles
grdhisteq Histogram equalization for grdfiles
grdlandmask Creates mask grdfile from coastline database
grdmask Set nodes outside a clip path to a constant
grdmath Reverse Polish calculator for grdfiles
grdvolume Calculating volume under a surface within a contour

POSTSCRIPT LIBRARY FUNCTION CALLS (for developers):

pslib Reference manual for libpsl.a

Alphabetical listing of GMT Unix man pages

For a thematic listing of GMT man pages, click here.