, I drew pencil sketches around several plates and saucers to get concentric circles, then drew in four radial lines for the main walls. I marked the streets off in light pencil. I inked the walls first, then did the buildings in each quarter, largely freehand, in pen. I did each quarter in a separate sitting to make sure that each had a distinct architectural / planning style. Then I posted a high-res scan online where a friend made it B&W, since the original was on light sepia construction paper. The scan and re-coloring got rid of a lot of the pencil lines and noise, too! I printed that, colored it with some markers, and scanned it back in.