The Generic Mapping Tools Documentation

Welcome to the GMT Docs! Here you’ll find resources for using GMT and examples of what it can do.

Quick links

Common Options Projection Specifications Default Settings (gmt.conf) GMT Colors

35 Postscript Fonts Built-in CPTs Built-in patterns Octal Codes of Characters

Pen Syntax Fill Syntax Grid Format Specifications

Getting started

• Example Gallery
• GMT Tutorial

Reference documentation

• GMT Modules
• GMT Cookbook
• Datasets

Resources

• Users Script Contributions
• Users Symbol Contributions
• Changelog
• Deprecated GMT Defaults Names
• Switching between different GMT versions
• Migrating from an earlier GMT version

Classic Mode

• Common Options (Classic Mode)
• GMT Modules (Classic Mode)

Developer Resources

• Contributing Guide
• Code of Conduct
• reStructuredText Cheatsheet
• Debugging GMT
• GMT C API
• PostScriptLight C API