GMT is an open-source collection of command-line tools for manipulating geographic and Cartesian data sets (including filtering, trend fitting, gridding, projecting, etc.) and producing PostScript illustrations ranging from simple x-y plots via contour maps to artificially illuminated surfaces and 3D perspective views. It supports many map projections and transformations and includes supporting data such as coastlines, rivers, and political boundaries and optionally country polygons. By default, GMT will use Dave Watson's Delaunay triangulation routine. However, a much faster alternative is available from Jonathan Shewchuk, but his routine is not distributed under the GNU Public License. In order to use the Shewchuk's routine you have to launch the script by passing the SHEWCHUK parameter: SHEWCHUK=yes ./GMT.SlackBuild For movie-making capabilities the following dependencies are needed: GraphicsMagick ffmpeg Other optional dependencies are: blas lapack For more details refer to the README.md and LICENSE.TXT files contained into the GMT sources.