First, several images of the initial drawing. This was done with a mechanical pencil. After a light sketch, I work from the top left corner to the bottom right corner to minimize smudges. The completed drawing is then scanned and the digital work begins.
I begin by adjusting the image for the clarity of the pencil strokes, then remove anything I don't like. Several lines are burned specifically; I pay special attention to the border and coasts. Then colors are added using a brush on low opacity. You see several stages where it appears I am painting over the same space multiple times. This is when I am isolating each layer so that the colors may be edited individually. I have layers for the cities, the grass/ground, the trees and mountains, the water, and the border. This allows me to edit the color of each individually or as a whole.
This is a condensed version of 5 hours and 40 minutes of digital work. I did not time the initial drawing.