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+GMT is an open source collection of about 80 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; the GMT
+supplements add another 40 more specialized and discipline-specific
+tools.
+
+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 more details refer to the README and LICENSE.TXT files contained
+into the GMT sources.