GEOGRAPHICAL INFORMATION SYSTEMS (GIS) Refer to the topographical map and the orthophoto map. Match the information in COLUMN A with the information in COLUMN B. Write only the number next to the letter in the ANSWER BOOK, e.g. (c) 4.

A high-resolution orthophoto map means that the pixels are small, allowing for more detail and making features easier to identify.

The correct option is A (i) and (iii).

Buffering in GIS is the process of creating a zone around a selected feature (point, line, or polygon) at a specified distance. This zone is often used for analysis, such as identifying areas within a certain distance of a feature.

Without the topographical map for block B5, I will provide a common natural feature used for buffering around dams.
A physical (natural) feature that could be used to buffer the Vanryn Dam is a mountain range or hills.

Buffering around the Vanryn Dam can have several positive human impacts, such as:

• Protecting the water quality of the dam by preventing pollution from nearby human activities.
• Controlling urban development or agriculture too close to the dam, which helps maintain the dam's structural integrity and prevents erosion into the reservoir.
• Preserving natural ecosystems around the dam, which can support biodiversity and provide recreational opportunities.