Thanks for the advice

Now, if I only knew how to instantly transform my scanned maps into clean black'n white images.....whenever I scan a pencil drawing, all I get is...well...grey pencil strokes, a not so grey paper background (but certainly nowhere near white) and a lot of grids.

And even when I start digitalizing the drawing, I end up making a whole new map/drawing from skratch because I can't incorporate the original, scanned drawing satisfyingly