Hi Pam,
 
 
> 
> I have grass dig files of soil lines based on the NAD27..what is the most
> appropriate way to get those file to the NAD83 to match my NAD83 digital
> orthos...are there software programs that already exist that will help me
> in this procedure...v.transform ..lt4x...arcinfo...

Arc Info will certainly do the trick. It is a simple matter to use the
PROJECT command to move a coverage from nad27 to nad83.  I know of programs
that will do the same for points, but I don't know how else to do it with
a full coverage.

Gary O.
garyo@hydroqual.com



