On a large-scale map, buildings would likely be shown as:

For large-scale maps, features like buildings are represented using individual polygons. This is because large-scale maps focus on detailed areas, allowing the representation of each building's shape and footprint accurately. Polygons can effectively show the boundaries and outlines of structures, giving the viewer visual and spatial context about their dimensions and layout.

In contrast, other forms such as lines, points, or icons are less suitable for this level of detail. Lines might represent larger linear features like roads, points are typically used for smaller features that do not require detailed shape representation (like trees or lamps), and icons may stylize the representation of objects without conveying precise outlines or area coverage. The use of polygons thus ensures that the complexity and individuality of each building are captured comprehensively, which is essential for a large-scale map emphasizing detail.