3.1 GMT summary

The following is a summary of all the programs supplied with GMT and a very short description of their purpose. For more details, see the individual UNIX manual pages or the online web documentation. For a listing sorted by program purpose, see Section 3.2.

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 		 Filter 1-D table data sets (time series) 

fitcircle 		 Finds the best-fitting great or small circle for a set of points 

gmt2rgb 		 Convert Sun raster or grd file to red, green, blue component grids 

gmtconvert 		 Convert data tables from one format to another 

gmtdefaults 		 List the current default settings 

gmtmath 		 Mathematical operations on table data 

gmtselect 		 Select subsets of table data based on multiple spatial criteria 

gmtset 		 Change selected parameters in current .gmtdefaults4 file 

grd2cpt 		 Generate a color palette table from a gridded file 

grd2xyz 		 Conversion from 2-D gridded file to table data 

grdblend 		 Blend several partially over-lapping grdfiles onto one grid 

grdclip 		 Limit the z-range in gridded data sets 

grdcontour 		 Contouring of 2-D gridded data sets 

grdcut 		 Cut a sub-region from a gridded file 

grdedit 		 Modify header information in a 2-D gridded file 

grdfft 		 Perform operations on gridded files in the frequency domain 

grdfilter 		 Filter 2-D gridded data sets in the space domain 

grdgradient 		 Compute directional gradient from gridded files 

grdhisteq 		 Histogram equalization for gridded files 

grdimage 		 Produce images from 2-D gridded data sets 

grdinfo 		 Get information about gridded files 

grdlandmask 		 Create masking gridded files from shoreline data base 

grdmask 		 Reset grid nodes in/outside a clip path to constants 

grdmath 		 Mathematical operations on gridded files 

grdpaste 		 Paste together gridded files along a common edge 

grdproject 		 Project gridded data sets onto a new coordinate system 

grdreformat 		 Converts gridded files into other grid formats 

grdsample 		 Resample a 2-D gridded data set onto a new grid 

grdtrack 		 Sampling of 2-D gridded data set along 1-D track 

grdtrend 		 Fits polynomial trends to gridded files 

grdvector 		 Plotting of 2-D gridded vector fields 

grdview 		 3-D perspective imaging of 2-D gridded data sets 

grdvolume 		 Calculate volumes under a surface within specified contour 

makecpt 		 Make color palette tables 

mapproject 		 Transformation of coordinate systems for table data 

minmax 		 Report extreme values in table data files 

nearneighbor 		 Nearest-neighbor gridding scheme 

project 		 Project table data onto lines or great circles 

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 rasterfiles 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 grayscale or colorscale on maps 

pstext 		 Plot textstrings 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 

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 $y = f(x)$ series 

trend2d 		 Fits polynomial trends to $z = f(x,y)$ series 

triangulate 		 Perform optimal Delauney triangulation and gridding 

xyz2grd 		 Convert an equidistant table xyz file to a 2-D gridded file