MAP: I noticed that the word 'map' is used in paint and similar software to refer to something other than an actual (topographical, geographical, political, etc.) "map". I'm using "map" in the original sense - a graphical representation of actual geographical, etc. features.
JPG: I would use the jpg of a map only to make an outline. After that I don't' need it.
Can I create layers containing different information graphically -- a layer of rivers and lakes, a layers of trade routes, a layer of ancient roads, a layer of modern roads, a layer of ancient sites, an layer of modern sites, a layer of battle sites, and so on -- and turn these layers on/off as I need them to output a "map" (original meaning) showing only the information I want to show?