Pay attention to Ekaterina Koroleva’s composition choices, i.e. where and how she places her subject in the frame (running off the edge, pushed to one side, parts cut off or eliminated). That, combined with her loose, layered sketches, subtle colours, and simple shapes, create an interesting aesthetic. More on Ekaterina Koroleva’s website.
Portrait artist Ed Fairburn works with ink and pencil on maps. He primarily uses two techniques to create value (light/dark): crosshatching between streets (which preserves the layout of towns and cities), and following and manipulating the weighting of contours (the organic lines which show elevation). More info and work on Ed Fairburn’s website.