libgmt6 6.4.0+dfsg-2 (amd64 binary) in ubuntu lunar

 GMT libraries allow 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.
 .
 This package contains the GMT library.