## GMT Online Man Pages

These man pages are html-versions of the Unix man pages for GMT. They are grouped both alphabetically or by function.

### Thematic listing of GMT Unix man pages

For alphabetical order, click here.

### GMT WRAPPER:

- GMT A Wrapper for GMT programs

### 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
- pslegend Plot legend 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:

- greenspline Gridding using Green's function splines
- 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:

- gmtcolors Information on how to specify colors in GMT
- 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:

- gmt2rgb Convert Sun raster or grdfile to red, green, blue component grids
- 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
- grdblend Blend several gridded data sets into one
- 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

### MANIPULATION OF GMT POSTSCRIPT FILES:

- ps2raster Crop and convert PostScript to raster image, EPS and PDF

### POSTSCRIPT LIBRARY FUNCTION CALLS (for developers):

- pslib Reference manual for libpsl.a

### GMT SHELL SCRIPTS:

- gmt_shell_functions Simplifying GMT bash scripting
- gmtcolors Information on how to specify colors in GMT
- gmtget Get present value of a GMT defaults parameter
- gmtlogo Plot a GMT logo as an overlay
- isogmt Run GMT command or script in isolation mode
- psbbox Replace BoundingBox line in PostScript files

### Alphabetical listing of GMT Unix man pages

For a thematic listing, click here.

1. blockmean L2 (x,y,z) data filter/decimator
2. blockmedian L1 (x,y,z) data filter/decimator
3. blockmode Mode-estimating (x,y,z) data filter/decimator
4. filter1d Filter 1-D data (time series)
5. fitcircle Finds best-fitting great or small circles
6. gmt_shell_functions Simplifying GMT bash scripting
7. gmt2rgb Convert Sun raster or grdfile to red, green, blue component grids
8. gmtcolors Information on how to specify colors in GMT
9. gmtconvert Convert table data from one format to another
10. gmtdefaults List the current default settings
11. gmtget Get present value of a GMT defaults parameter
12. gmtlogo Plot a GMT logo as an overlay
13. gmtmath Reverse Polish calculator for table data
14. gmtselect Select table subsets based on multiple spatial criteria
15. gmtset Edit parameters in the .gmtdefaults file
16. grd2cpt Make color palette table from grdfile
17. grd2xyz Convert 2-D gridded data to table
18. grdblend Blend several gridded data sets into one
19. grdclip Limit the z-range in gridded data sets
20. grdcontour Contouring of 2-D gridded data
21. grdcut Cut a sub-region from a grd file
22. grdedit Modify grd header information
23. grdfft Operate on grdfiles in frequency domain
24. grdfilter Filter 2-D data in space domain
25. grdgradient Compute directional gradient from grdfiles
26. grdhisteq Histogram equalization for grdfiles
27. grdimage Produce images from 2-D gridded datar
28. grdinfo Get information about grd files
29. grdlandmask Creates mask grdfile from coastline database
30. grdmask Set nodes outside a clip path to a constant
31. grdmath Reverse Polish calculator for grdfiles
32. grdpaste Paste together grdfiles along common edge
33. grdproject Project gridded data onto new coordinate system
34. grdreformat Convert from one grdformat to another
35. grdsample Resample a 2-D gridded data onto new grid
36. grdtrack Sampling of 2-D data along 1-D track
37. grdtrend Fits polynomial trends to grdfiles (z = f(x,y))
38. grdvector Plot vector fields from 2-D gridded data
39. grdview 3-D perspective imaging of 2-D gridded data
40. grdvolume Calculating volume under a surface within a contour
41. greenspline Gridding using Green's function splines
42. isogmt Run GMT command or script in isolation mode
43. makecpt Create GMT color palette tables
44. mapproject Transformation of coordinate systems
45. minmax Report extreme values in table datafiles
46. nearneighbor Nearest-neighbor gridding scheme
47. project Project data onto lines/great circles
48. ps2raster Crop and convert PostScript to raster image, EPS and PDF
49. psbasemap Create a basemap frame
50. psbbox Replace BoundingBox line in PostScript files
51. psclip Use polygon files as clipping paths
52. pscoast Plot coastlines, filled continents, rivers, and political borders
53. pscontour Direct contouring or imaging of xyz-data by triangulation
54. pshistogram Plot a histogram
55. psimage Plot Sun rasterfiles on a map
56. pslegend Plot legend on a map
57. psmask Create overlay to mask specified regions of a map
58. psrose Plot sector or rose diagrams
59. psscale Plot grayscale or colorscale
60. pstext Plot textstrings
61. pswiggle Draw anomalies along track
62. psxy Plot symbols, polygons, and lines in 2-D
63. psxyz Plot symbols, polygons, and lines in 3-D
64. sample1d Resampling of 1-D data
65. spectrum1d Compute spectral estimates from time-series
66. splitxyz Split xyz files into several segments
67. surface Continuous curvature gridding algorithm
68. trend1d Fits polynomial or Fourier trends to y = f(x) series
69. trend2d Fits polynomial trends to z = f(x,y) series
70. triangulate Perform optimal Delauney triangulation on xyz data
71. triangulate Perform optimal Delauney triangulation on xyz data
72. xyz2grd Convert table to 2-D grd file

For a thematic listing of GMT man pages, click here. Return to GMT Online Services page.