Which transformer would you use to create buffer areas within 1 kilometer of a bus stop?

• A. Clipper
• B. Bufferer
• C. Aggregator
• D. Dissolver

Answer: (B)

Buffering is about creating zones at a fixed distance around input features. To get areas within 1 kilometer of bus stops, use the Bufferer to generate 1-km buffers around each bus-stop point. The Bufferer takes your point features and outputs polygon rings representing the distance you specify; set the distance to 1000 meters (or 1,000 map units if your data uses meters or a projected CRS with meter units) so the resulting polygons cover everything within that radius. Ensure you’re working in a projected coordinate system so the distance corresponds to real-world meters; in geographic coordinates, 1 km isn’t a constant degree distance without projection.

The other transformers don’t create such distance-based zones: a Clippe r trims features by a boundary, an Aggregator groups or summarizes features, and a Dissolver merges adjacent polygons but does not generate new buffer areas.