Which material has great dimensional stability and is used in map drawing?

• A. Analemma
• B. Isometric Diagram
• C. Vinylite
• D. Gelatin

Answer: (C)

Dimensional stability in drawing substrates is crucial for accurate maps. A base that stays flat and resists shrinking or swelling across humidity and temperature changes keeps lines and scales true as you draw and later when the map is stored.

Vinylite is a plastic sheet known for its excellent dimensional stability. It doesn’t absorb moisture like paper, so it remains flat and its surface stays smooth, allowing precise ink or pencil work without distortion. This stability makes it ideal for map drawing.

Analemma and isometric diagram refer to types of diagrams, not materials. Gelatin, on the other hand, is a binder that can swell or shrink with humidity, leading to distortion. So Vinylite best provides the stable drawing surface needed for accurate map work.