Question

Which of the following operations involves selecting all land parcels with slope \(>15^\circ\) and soil type is clay, without creating new data entities?

• A. Aggregation
• B. Generalization
• C. Retrieval
• D. Classification

Hint:

Remember: \[ \boxed{ \text{Retrieval} = \text{Selection of existing features using queries} } \] No new dataset is created.

Answer 1

The Correct Option is C

Concept: Retrieval in GIS is the process of selecting existing spatial features that satisfy specified attribute or spatial conditions without creating new datasets.

Step 1: Understand retrieval. The query \[ \text{Slope} > 15^\circ \quad \text{AND} \quad \text{Soil Type = Clay} \] selects only those land parcels satisfying both conditions.

Step 2: Identify the GIS operation. Since no new spatial entities are created, \[ \boxed{\text{The operation is Retrieval}.} \] Therefore, the correct option is \[ \boxed{(C).} \]