The Generic Mapping Tools Version 6

Paul Wessel, Joaquim Luis, Leonardo Uieda, Remko Scharroo, Florian Wobbe, Walter H. F. Smith, Dongdong Tian

This article is currently undergoing peer-review at Geochemistry, Geophysics, Geosystems.

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About

This paper marks the release of GMT version 6. Most of the work done for this release had the goal of reducing barriers to entry for new users. The user experience as a whole has been improved and these changes are the foundation for my work on PyGMT.

The development of the new modern mode was funded by our NSF EarthScope grant.

Plain language summary

The Generic Mapping Tools software is widely used in Earth and Ocean sciences to process data and make maps and illustrations. This new version simplifies usage, adds quick access to key data sets and provides a tool for making scientific animations.

Abstract

The Generic Mapping Tools (GMT) software is ubiquitous in the Earth and Ocean sciences. As a cross-platform tool producing high quality maps and figures, it is used by tens of thousands of scientists around the world. The basic syntax of GMT scripts has evolved very slowly since the 1990s, despite the fact that GMT is generally perceived to have a steep learning curve with many pitfalls for beginners and experienced users alike. Reducing these pitfalls means changing the interface, which would break compatibility with thousands of existing scripts. With the latest GMT version 6, we solve this conundrum by introducing a new "modern mode" to complement the interface used in previous versions, which GMT 6 now calls "classic mode". GMT 6 defaults to classic mode and thus is a recommended upgrade for all GMT 5 users. Nonetheless, new users should take advantage of modern mode to make shorter scripts, quickly access commonly used global data sets, and take full advantage of the new tools to draw subplots, place insets, and create animations.

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