GMT: GMT (Generic Mapping Tools) GMT: GMT: GMT is an open source collection of about 80 command-line tools for GMT: manipulating geographic and Cartesian data sets (including filtering, GMT: trend fitting, gridding, projecting, etc.) and producing PostScript GMT: illustrations ranging from simple x-y plots via contour maps to GMT: artificially illuminated surfaces and 3D perspective views. GMT: GMT: Homepage: http://gmt.soest.hawaii.edu GMT: GMT: