## 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:

- 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:

- 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

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

- pslib Reference manual for libpsl.a

### Alphabetical listing of GMT Unix man pages

For a thematic listing, click here.

1. blockmean
2. blockmedian
3. blockmode
4. filter1d
5. fitcircle
6. gmt2rgb
7. gmtconvert
8. gmtdefaults
9. gmtmath
10. gmtselect
11. gmtset
12. grd2cpt
13. grd2xyz
14. grdblend
15. grdclip
16. grdcontour
17. grdcut
18. grdedit
19. grdfft
20. grdfilter
21. grdgradient
22. grdhisteq
23. grdimage
24. grdinfo
25. grdlandmask
26. grdmask
27. grdmath
28. grdpaste
29. grdproject
30. grdreformat
31. grdsample
32. grdtrack
33. grdtrend
34. grdvector
35. grdview
36. grdvolume
37. makecpt
38. mapproject
39. minmax
40. nearneighbor
41. project
42. psbasemap
43. psclip
44. pscoast
45. pscontour
46. pshistogram
47. psimage
48. pslegend
49. psmask
50. psrose
51. psscale
52. pstext
53. pswiggle
54. psxy
55. psxyz
56. sample1d
57. spectrum1d
58. splitxyz
59. surface
60. trend1d
61. trend2d
62. triangulate
63. xyz2grd
64. GMT
65. grdraster
66. img2mercgrd
67. img2grd
68. psmeca
69. pscoupe
70. pspolar
71. psvelo
72. mgd77convert
73. mgd77info
74. mgd77list
75. mgd77manage
76. mgd77path
77. mgd77sniffer
78. mgd77track
79. binlegs
80. dat2gmt
81. gmt2bin
82. gmt2dat
83. gmtinfo
84. gmtlegs
85. gmtlist
86. gmtpath
87. gmttrack
88. mgd77togmt
89. gmtdigitize
90. gmtstitch
91. makepattern
92. nc2xy
93. psmegaplot
94. ps2raster
95. pssegy
96. pssegyz
97. segy2grd
98. backtracker
99. hotspotter
100. rotconverter
101. grdrotater
102. originator
103. x2sys_binlist
104. x2sys_datalist
105. x2sys_cross
106. x2sys_get
107. x2sys_init
108. x2sys_put
109. x_edit
110. x_init
111. x_list
112. x_over
113. x_remove
114. x_report
115. x_setup
116. x_solve_dc_drift
117. x_system
118. x_update

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