GSMCAD
This disks contains the files necessary to install a beta version of the program GSMCAD, which is a windows based program implementing many of the functions of the GSMAP program system developed by Selner and Taylor(1993).  The first official release of GSMCAD should be December, 1995.  In the interim the most recent revision of the program (GSMCAD.EXE) and a self extracting archive of all the files on the installation disk (GSMCADIN.EXE) can be found at an ftp site on the internet on IP 36.177.80.14  in directory /tmp/rwahl.  
	The program must be initially be installed by running the setup program on this disk from within windows (FILE menu, RUN option), but subsequently can be updated by copying a new GSMCAD.EXE into the GSMCAD directory.  
	Documentation consists of the GSMCAD.HLP file, which uses the windows help utility to provide on line, context-sensitive help.  The data base file structure is identical to that of the GSMAP DOS version, so there is no problem in moving between DOS and windows.  However, the metric option has not yet been implemented in the windows version.  When potential users express a priority need for a metric option, I will implement it and test it.
	When digitizing, the program gives oral prompts.  To hear these the computer must either have a sound card and speakers or have the PCspeaker driver installed.  That driver is included on the distribution disk in the speaker directory.  If needed, it must be installed as a new driver using the drivers option under the control panel.  It is not automatically installed by the setup program.  	Digitizing with standard GSMAP settings for the digitizing tablet works as usual, but using other settings makes additional options available.  If the digitizer is set on continuous binary mode, the cursor will track the position of the keypad on the tablet, much like a mouse cursor.  Also it becomes possible (but not necessary) to digitize in continuous mode without holding down the zero key.  Points are taken in the range of .03 to .3 inches apart depending on the curvature of the line.
	To signify binary mode the config9.dig file in the GSMCAD directory must include the word KEYPADB rather than KEYPAD.  Only the GTCO high resolution binary format is supported, but that is emulated by many modern digitizers.  
	A Calcomp 9500 series digitizer works well using the same settings recommended for other CAD programs in GTCO mode as listed in the table of menu settings for selected graphics packages.  The format must be format 23 (9500 Format #5) set by soft switches in the format area (on off on on on).  The mode should be RUN (off on off off off off) for continuous digitizing.

Address comments and suggestions to: vwilliam@usgs.gov
Van S. Williams			     (303) 236-1289
U.S.G.S. MS 913
DFC Box 25046
Denver, CO 80115-0046