Mendes, A. F.Kullberg, J. C.2010-12-142010-12-141992http://hdl.handle.net/10362/4500The development of an algorithm for the construction of auxiliary projection nets (conform, equivalent and orthographic), in the equatorial and polar versions, is presented. The algorithm for the drawing of the "IGAREA 220" counting net (ALYES & MENDES, 1972), is also presented. Those algorithms are the base of STEGRAPH program (vers. 2.0), for MS-DOS computers, which has other applications.engProjectionsNetsCrystallographyStructural GeologyBASICMS-DOSjournal article