Old grassu-mail says moss to grass isn't possible. I gather
most of the problem is in the non-topologic type of the vectors, which
will get you into a terrible mess once you import it into grass.
Sorry!Martijn van Leusen
Really truly clean MOSS files - ie where the shared polgyon boundaries
are _exact_ duplicates - can be read in by appending the MOSS file to
a GRASS dig_ascii file with no existing coordinates (ie it just
contains relevant header info), editing the file to put "A" at the
beginning of each polygon header, and running v.in.ascii. GRASS will
think each polygon is an island, but it will rasterize them OK.
Usually.
-kenn