"The Generalized Geographic Mapping System (GGMS) is a computer program that draws accurately proportioned maps virtually anywhere in the world, utilizing a variety of land mass data bases. It has evolved over several years from a single, narrow application, to a callable subroutine system capable of handling a variety of applica- tions. The GGMS is written in standard FORTRAN IV and is machine- independent except where noted. The GGMS was written to interact with Tektronix!/ PLOT-10 software and 4010-series terminals. The only required Tektronix software is the Terminal Control System, Level 1. If the user's capabilities include a Tektronix flatbed plotter, then the Tektronix utility Routines are also required"--Introduction, paragraph 1.

Public Domain