Question

Sliver polygons are:

• A. A polygon representing silver mineral deposits
• B. A polygon created by dissolving adjacent polygons
• C. A very small and narrow polygon formed unintentionally during overlay due to boundary mismatches
• D. A large polygon created after buffering a feature

Hint:

Remember: \[ \boxed{ \text{Overlay Error} \rightarrow \text{Boundary mismatch} \rightarrow \text{Sliver Polygon} } \] They are usually removed during topology cleaning.

Answer 1

The Correct Option is C

Concept: A sliver polygon is an unwanted polygon created during overlay operations when the boundaries of two map layers do not perfectly coincide. It is considered a topological error in GIS.

Step 1: Understand how sliver polygons are formed. Suppose two adjacent polygons have slightly different boundaries. During overlay, \[ \text{Overlay} \longrightarrow \text{Tiny gap} \longrightarrow \text{Sliver polygon} \] These polygons usually have
• Very small area
• Narrow shape
• No real geographic significance

Step 2: Identify the correct definition. Hence, \[ \boxed{\text{Sliver polygons are small unwanted polygons formed due to boundary mismatches.}} \] Therefore, the correct option is \[ \boxed{(C).} \]