Generic Mapping Tools (GMT) is an open source collection of ~60 tools for manipulating geographic and Cartesian data sets (including filtering, trend fitting, gridding, projecting, etc.) and producing Encapsulated PostScript File (EPS) illustrations ranging from simple x-y plots via contour maps to artificially illuminated surfaces and 3-D perspective views. GMT supports ~30 map projections and transformations and comes with support data such as GSHHS coastlines, rivers, and political boundaries. GMT is developed and maintained by Paul Wessel and Walter H. F. Smith with help from a global set of volunteers, and is supported by the National Science Foundation. It is released under the GNU General Public License. This requires netcdf. There are a number of different resolution coastline files available for GMT, and their size on disk varies from <2MB (low) to 61.7MB (full). They come in 3 separate archives: GSHHS2.1.0_coast.tar.bz2 GSHHS2.1.0_high.tar.bz2 GSHHS2.1.0_full.tar.bz2 The first contains the low, intermediate and coarse resolutions, the second the high resolution, and the third the full resolution. I prefer to have all of them installed (disk space is cheap), but you may not. Therefore, all three sets will be installed by default unless you choose otherwise in the script, e.g. setting "COASTS=coast" in the environment would install only the low, intermediate, and coarse resolutions. Please note, Shewchuk's triangulation routine used in some parts of GMT is not distributed under the GNU Public Licence. If you work for a for-profit organisation, you should read Shewchuk's copyright statement first (in src/README.TRIANGLE). This script enables the (much faster) Shewchuk triangulation routine by default; should you need to change this behaviour, set SHEWCHUK to "no" in the build script.