Generic Mapping Tools (GMT) is a free, public-domain collection of about 60 UNIX tools that allow users to manipulate (x,y) and (x,y,z) data sets (including filtering, trend fitting, gridding, projecting, etc.) and produce Encapsulated PostScript File (EPS) illustrations ranging from simple x-y plots through contour maps to artificially illuminated surfaces and 3-D perspective views in black and white, gray tone, hachure patterns, and 24-bit color. GMT supports 25 common map projections plus linear, log, and power scaling, and comes with support data such as coastlines, rivers, and political boundaries.
Release Notes: Bugs were fixed.
Release Notes: This release adds numerous bugfixes.
Release Notes: Hawaiian time language items were added. National borders were corrected. The function SQR was added. 64-bit support was added. Numerous bugs were fixed.
Release Notes: This version added a GMT_WIND_LON(lon) macro that handles periodicity, an option to not clip image at map the boundary, and cylindrical stereographic projection. The horizon is now optional. Library installation issues were fixed. The Welford (1962) algorithm was implemented for more precise one-pass computation of mean and sum of squares. Initial full 64-bit support was implemented. A new rectangular clip function using the Sutherland/Hodgman algorithm was added. Many bugs were fixed.
Release Notes: The build system has been replaced. There is also an improvement to how the BCR 2-D interpolations for images and grids are done by adding B-spline and nearest neighbor as optional interpolants, an introduction of a new PostScript Level 2 pattern machinery in pslib.c, an updated GSHHS coastline version (which also includes Australia internal state boundaries, fixes to the Yemeni and Lebanese borders, and more river lines), and general improvements and corrections to the documentation.