It all comes down to perspective

Here are some sketches I did for one of my classes. In both cases I was given a site in plan view (view from directly above, as in a typical plan) and had to render a sketch that dipicted what was on the plan. Sketches always have people, to show scale. Most of my fellow students trace the people, but I prefer to draw my own. In the two-point perspective, I set up most of the perspective lines, such as the arbor, the walls and the joints in the paving, in a SketchUp model and traced over them.