Paul Wessel & Walter H. F. Smith. Department of Geology and Geophysics School of Ocean and Earth Science and Technology (SOEST) University of Hawai'i at Manoa 1680 East-West Rd., POST # 812, Honolulu, HI 96822 USA pwessel(at)hawaii.edu walter(at)amos.grdl.noaa.gov
UNIX, Windows, MAC
collection of ~60 tools for manipulating geographic and Cartesian data sets (including filtering, trend fitting, gridding, projecting, etc.
+ time series + grid filtering (mean, median) + 30 map projections supported
+ produces Encapsulated PostScript File (EPS) illustrations ranging from simple x-y plots through contour maps to artificially illuminated surfaces and 3-D perspective views + comes with support data such as coastlines, rivers, and political boundaries