Very helpful information. I see, I have to make some thoughts about this project.
I see some members making encounter maps for print (like The Red Epic) in different settings who uses letter format; as I understand it these would be for use in campaigns and not for miniatures.

I know this may sound like questions of a RPG newbie, but I played a RPG only once and this was 12 or 13 years ago. As mapper I seldom have to think about the game itself.

I appreciate the help and comments.