Tiago,

I don't know the answer to your question, but you may want to try a
free software program that is a raster to vector conversion.

It is called wintopo, go to google and type in wintopo and it will
take you to the web site.

I hope this will help

Kyle C
Founder

--- In autocad4landscapearchitects@yahoogroups.com, "relvaor"
<relvaor@y...> wrote:
> I'm a Urban Planning student and usualy we have to vectorize raster
> images by hand. Usualy the process is line/pan/line/pan, etc...
> I would be usefull that there were a lisp wich would recenter the
> work space to the last point inserted, each time a line is drawn.
>
> Do any of you know of such a tool??
>
> Tiago Relvão