I agree with everything Kell said. But I'd like to add that the level of detail is a balance. A shoreline looks smoother zoomed out rather than when you're closer in and seeing every inlet and beach.

Likewise, I think focusing on the continent-scale also means you're dealing with fewer specifics details and more biome related. So you'll have a "coastal biome" and "mountain range" and major rivers vs. labeling every individual swamp, forest, creeks, streams, hill country.