Which technology enables data collection from satellites for geographic analysis?

• A. Ground surveys
• B. Remote sensing
• C. Aerial photography
• D. Dendrochronology

Answer: (B)

Remote sensing is collecting information about the Earth from a distance using sensors on satellites to measure reflected light, heat, or radar signals. This lets scientists map land cover, track vegetation health, monitor climate-related changes, and study large areas repeatedly over time, which is essential for geographic analysis. Satellites provide broad, repeated coverage that ground-based methods can’t match, enabling consistent datasets for GIS work.

Ground surveys require on-site measurements, which limits scope and scale. Aerial photography comes from aircraft, not satellites, so it isn’t satellite-based data collection. Dendrochronology uses tree rings to infer past environmental conditions, not satellite data collection.