Intro

[jbgibson]

The capability of your computer is going to create the limit on your map file size. How much RAM do you have? You can get crisper, sharper effects by working at as large a size as your machine can handle, then reducing it when done. That awkward 15 pixel wiggle becomes two pixels and inconsequential. Do you have access to a tablet for input, or will it be a mouse you use? Ever even tried a pen & tablet? If not this might not be enough time to get used to one, which is a shame - folks hereabouts swear by 'em for speed and accuracy.

Correct me if I'm wrong, but I picture geologic maps as having somewhat simple polygons, and flat colors or swaths of patterns as fill, albeit with strike/ dip/ fault symbology. That'll tax a computer a bit less than gradients of color and photo realism / satellite views. I'm worried about the originality expectation. Is this intended as exact location of features, or as schematic representation of relationships? Suppose you can use something like OpenStreetMap for the basic land/ river/ city shapes? Or will you have to "trace" even that with your own linework? That's permissible with OpenStreetMap btw - no copyright specifically so anyone can use the data in any way desired.

Do you feel like you're getting a handle on The Gimp?

If what's due next is a draft, reckon the maps can be draft quality? Digital mapping lets you revise and improve ad infinitum.