These man pages are html-versions of the Unix man pages for the GMT supplemental programs, grouped by package. Note that only the packages actually installed on your system will be accessible.

The DBASE package

• grdraster Extraction of gridfiles from databases

The GSHHG package

• gshhg Extract ASCII data from GSHHG cooastlines, rivers, and borders
• gshhg_dp Line-reduction tool for GSHHG full-resolution data
• gshhgtograss Conversion from GSHHG format to GRASS

The IMGSRC package

• img2google Create Google Earth KML tiles from the topo.11.1.img bathymetry grid
• img2grd Front-end Bourne script to img2mercgrd
• img2mercgrd Extracting data from Sandwell/Smith altimetry solutions

The MECA package

• pscoupe Plot seismic moment tensor and/or double couples on a cross-section
• psmeca Plot seismic moment tensor and/or double couples on maps
• pspolar Plot polarities on the lower half-sphere
• psvelo Plot velocity ellipses, strain crosses, or strain wedges on maps

The MGD77 package

• mgd77convert Convert between different MGD77 file formats
• mgd77header Obtain header information from MGD77 A77 files
• mgd77info Obtain information from MGD77 cruise files
• mgd77list Extract data from MGD77 cruise files
• mgd77magref Evaluate the IGRF or CM4 magnetic field models
• mgd77manage Manage the enhanced MGD77+ netCDF files
• mgd77path Get full pathnames of MGD77 cruise files
• mgd77sniffer Along-track quality control of MGD77 cruise files
• mgd77track Plot the tracks of MGD77 cruise files

The MGG package

• binlegs Maintain shiptrack index files database
• dat2gmt Convert ASCII listing to .gmt file
• gmt2bin Create bin-index files from .gmt files
• gmt2dat Write .gmt file as ASCII listing
• gmtinfo Report statistics of .gmt files
• gmtlegs Find all ship tracks in given area
• gmtlist Extract data from .gmt files
• gmtpath Find actual path to .gmt files
• gmttrack Plot ship tracks on maps
• mgd77togmt Convert MGD-77 files to .gmt format

The MISC package

• dimfilter Directional filtering of 2-D grdfiles in the space domain
• gmt2kml Convert GMT data tables to KML files for Google Earth
• gmtdigitize Digitize map features using a large-format digitizer
• gmtstitch Combine line segments that share end-points
• gmtdp Line reduction using the Douglas-Peucker algorithm
• kml2gmt Extract GMT data from a Google Earth KML file
• makepattern Make GMT color pattern from b/w pattern
• psmegaplot Make poster-size plot using tiling
• nc2xy Convert netCDF column file to ASCII xy data

The SEGYPROGS package

• pssegy Plot SEGY seismic data files in 2-D
• pssegyz Plot SEGY seismic data files in 3-D
• segy2grd Converting segy data to a GMT grid file

The SPH package

• sphtriangulate Spherical Delaunay or Voronoi diagrams
• sphdistance Calculate distances from lines to grids on a sphere
• sphinterpolate Spherical gridding in tension

The SPOTTER package

• backtracker Forward and backward flowlines or hotspot tracks
• grdrotater Rotate entire grids using a finite rotation
• hotspotter Make CVA grids by convolving flowlines and seamount shapes
• originator Associate seamounts with hotspot point sources
• rotconverter Manipulate finite and stage rotations

The X2SYS package

• x2sys_binlist Create bin-index files from generic track files
• x2sys_cross Generic track intersection (Crossover) detector
• x2sys_datalist Generic data extractor for ASCII and binary track data
• x2sys_get Find all track files in a given area
• x2sys_init Initialize a new index file database for track data
• x2sys_list Extract crossover information from data base
• x2sys_merge Merge an updated COEs table into a main one
• x2sys_put Maintain index files database for track data
• x2sys_report Report crossover statistics for tracks
• x2sys_solve Determine systematic corrections from crossovers

The X_SYSTEM package

• x_system MGG-specific track intersection (Crossover) System Overview
• x_edit Convert between ascii and binary crossover correction tables
• x_init Initialize a new crossover data base
• x_list Extract crossover data from data base
• x_over Calculate crossovers between two MGG cruise files in *.gmt format
• x_remove Remove crossover information from data base
• x_report Summarize crossover statistics from data base
• x_setup Determine which cruises need to be compared to current files
• x_solve_dc_drift Find best-fitting offset and drift-rates
• x_update Update data base with new crossover information

The XGRID package

• xgridedit A GUI editor of gridfiles

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