The Generic Mapping Tools Version 3.4--Technical Reference and Cookbook

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The Generic Mapping Tools

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Version 3.4

Technical Reference and Cookbook

Pål (Paul) Wessel

School of Ocean and Earth Science and Technology

University of Hawai'i at Manoa

and

Walter H. F. Smith

Laboratory for Satellite Altimetry

NOAA/NESDIS/NODC

April 2001

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Contents
List of Tables
List of Figures
Acknowledgments
The GMT Documentation Project
A Reminder
Copyright and Caveat Emptor!
Typographic conventions
1. Preface
2. Introduction
- References
3. GMT overview and quick reference
- 3.1 GMT summary
- 3.2 GMT quick reference
4. General features
- 4.1 GMT Units
- 4.2 GMT defaults
- 4.3 Command Line Arguments
- 4.4 Standardized command line options
- 4.5 Command Line History
- 4.6 Usage messages, syntax- and general error messages
- 4.7 Standard Input or File, header records
- 4.8 Verbose Operation
- 4.9 Output
- 4.10 PostScript Features
- 4.11 Landscape and Portrait Orientations
- 4.12 Overlay and Continue Modes
- 4.13 Specifying pen attributes
- 4.14 Specifying area fill attributes
- 4.15 Color palette tables
- 4.16 Character escape sequences
- 4.17 Embedded grdfile format specifications
- 4.18 Binary table i/o
5. GMT Projections
- 5.1 Non-map Projections
- 5.2 Conic Projections
- 5.3 Azimuthal Projections
- 5.4 Cylindrical Projections
- 5.5 Miscellaneous Projections
6. Cook-book
- 6.1 The making of contour maps
- 6.2 Image presentations
- 6.3 Spectral estimation and xy-plots
- 6.4 A 3-D perspective mesh plot
- 6.5 A 3-D illuminated surface in black and white
- 6.6 Plotting of histograms
- 6.7 A simple location map
- 6.8 A 3-D histogram
- 6.9 Plotting time-series along tracks
- 6.10 A geographical bar graph plot
- 6.11 Making a 3-D RGB color cube
- 6.12 Optimal triangulation of data
- 6.13 Plotting of vector fields
- 6.14 Gridding of data and trend surfaces
- 6.15 Gridding, contouring, and masking of unconstrained areas
- 6.16 Gridding of data, continued
- 6.17 Images clipped by coastlines
- 6.18 Volumes and Spatial Selections
- 6.19 Color patterns on maps
- 6.20 Custom map symbols
7. Mailing lists, updates, and bug reports
A. GMT supplemental packages
- A.1 cps: complete PostScript en-/decoder
- A.2 dbase: gridded data extractor
- A.3 gshhs: GSHHS data extractor
- A.4 imgsrc: gridded altimetry extractor
- A.5 meca: seismology and geodesy symbols
- A.6 mex: Matlab 5-GMT interface
- A.7 mgg: MGD77 extractor and plotting tools
- A.8 misc: posters, patterns, and digitizing
- A.9 segyprogs: Plotting SEGY seismic data
- A.10 spotter: backtracking and hotspotting
- A.11 x2sys: Track crossover error estimation
- A.12 x_system: Track crossover error estimation
- A.13 xgrid: visual editor for grdfiles
B. GMT file formats
- B.1 Table data
  - B.1.1 ASCII tables
  - B.1.2 Binary tables
- B.2 2-D grdfiles
- B.3 Sun raster files
C. Making GMT Encapsulated PostScript Files
D. Availability of GMT and related code
E. Predefined bit and hachure patterns in GMT
F. Chart of octal codes for characters
G. PostScript fonts used by GMT
H. Problems with display of GMT PostScript
- H.1 PostScript driver bugs
- H.2 Resolution and dots per inch
- H.3 European characters
- H.4 Hints
I. Color Space –-- The final frontier
J. Filtering of data in GMT
K. The GMT High-Resolution Coastline Data
- K.1 Selecting the right data
- K.2 Format required by GMT
- K.3 The long and winding road
- K.4 The Five Resolutions
L. GMT on non-UNIX platforms
- L.1 Introduction
- L.2 Cygwin and GMT
- L.3 DJGPP and GMT
- L.4 WIN32 and GMT
- L.5 OS/2 and GMT
- L.6 MacOS and GMT
Index
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Paul Wessel 2001-04-18