PROJ.4 System for MSDOS Release 4.3.3 The three principle programs of the PROJ.4 system are available as MSDOS exe (386+87 or higher) files in the zip distribution DOS-PJ433.zip: proj.exe - general cartographic projection program. geod.exe - geodesic distance/azimuth program. nad2nad.exe - converts geographic or grid data between North American Datum 27 and 83 as well as between SPCS and UTM coordinate systems for United State regions. In addition, the zip file includes init-files for State Plane Coordinate Systems (SPCS) grids and several non-US grid systems, as well as summary documentation of program usage. For full documentation, the user must secure the PostScript manuals. For NAD conversions with nad2nad, the zip files DOS_NAD1.zip and DOS_NAD2.zip containing the NADCON tables must also be downloaded. Installation Make a disk directory for the PROJ.4 system and unzip the DOS-PJ433.zip into this directory. Either add an entry to PATH or move the exe's to a current PATH entry directory. Perform: SET PROJ_LIB= This may be added to the AUTOEXEC.BAT (as well as PATH modification). For NAD datum conversions, add the directory NAD2783 to the directory pointed to by PROJ_LIB and unzip DOS_NAD1.zip and DOS_NAD2.zip files into this directory. For problems or questions, contact: Gerald (Jerry) I. Evenden Internet: gie@kai.er.usgs.gov voice: (508)563-6766 Postal: P.O. Box 1027 fax: (508)457-2310 N.Falmouth, MA 02556-1027