Using tcl was Re: redirecting stderr

charnotw charnotw at
Fri Sep 23 13:10:34 EDT 1994

> > are a lot of people programming with tcl and tk?  I've got
> > an application I'd like to put a cool front end on.  I just 
> > wondered if any standards and documentation had been developed
> > for using tcl with grass.  I've got tcltkgrass which works well
> > but the version I have has no documentation about programming
> > (or anything at all).  is anything happening!
> >
> > cheers  Tom  8-)
> TCL/TK is being used in many applications, including GRASS.  Any
> application that can be used on the command line or a script can easily
> be implemented.  
> but I have made a basic vis tool for several specific applications.
> It is also amenable for use in integrating GRASS to database 
> applications.  In particilar, I made a specific tool that uses
> INFORMIX directly and GRASS for spatial queries.
> Of course this could be done on the C level as the inf tools
> but I would not know about C....
> If you are serious about TCL/TK you may want the manual though...
> Keith M. Mitchell
> University of Illinois
> Dept. Of Ag. Engineering
> 229 AESB
> Urbana, IL 61801

I was really  wondering if anything had been arranged to coordinate
effort in the GRASS community. If a lot of people are using tcl
and tk with grass then, I suspect, a lot of wheels are being
re-invented.  So far, in the limited amount of tcl experimenting
I've done, I've had to implement the equivalent of; 
G_gisdbase, G_location_path, G_mapset, G_find_file and G_ask_old

in order to make one listbox from which to select a GRASS file. 

cheers, Tom  8-)

Tom Charnock
Dept Civil Engineering
Aston University
Birmingham B4 7ET UK
charnotw at

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