hand-drawn perspective rendering of a sloping landscape

Quick answer：

Hand-drawn perspective renderings are artistic representations of landscapes, buildings, or other scenes that are drawn to give a three-dimensional appearance on a two-dimensional surface. In the case of a sloping landscape, such a drawing would depict the terrain in a way that shows the viewer the elevation changes and the overall shape of the landscape. This type of drawing is often used in architectural design, landscape architecture, and environmental planning to visualize proposed developments or to create a detailed illustration of a natural or man-made area.