Question

In Geographical Information Systems, the term "layer" refers to

• A. A physical layer of material in hardware
• B. An interface component for user interaction
• C. A collection of related data or information over a particular area
• D. A filter used for data visualization

Hint:

A GIS organises geographic information into thematic layers, each representing one type of feature over a common geographic area so that layers can be overlaid and analysed together.

Answer 1

The Correct Option is C

Step 1: Understand how GIS organises data.
A GIS keeps geographic information in separate thematic sheets, each holding one kind of feature for the same area.

Step 2: Picture an example.
One sheet may hold roads, another rivers, another land use, all covering the same region so they can be stacked together.

Step 3: Rule out the hardware option.
A layer in GIS is not a physical layer of material in hardware, so that choice is wrong.

Step 4: Rule out interface and filter options.
It is also not a user interface component, nor just a filter for visualising data.

Step 5: Match the correct meaning.
A layer is a collection of related data or information over a particular area, which lets layers be overlaid and studied together.

Step 6: State the answer.
A layer is a collection of related data over a particular area.
\[ \boxed{\text{A collection of related data over a particular area}} \]