Question

High-resolution satellite imagery is most critically required in urban planning when:

• A. Studying continental scale climate variations
• B. Preparing small-scale regional maps at 1:50,000 scale
• C. Detecting unauthorized constructions at parcel level
• D. Estimating gross country-wide urban population growth metrics

Hint:

Match the imagery resolution to your project scale: Use Coarse/Medium Resolution for macro regional mapping, and reserve expensive High-Resolution (sub-meter) Imagery for micro-level tasks like property inspections and parcel enforcement.

Answer 1

The Correct Option is C

Concept: The choice of spatial resolution in geographic imaging systems depends on the scale of the urban planning task. Spatial resolution refers to the ground area represented by a single image pixel. While macro-scale analysis can utilize low-resolution imagery covering large swaths of land, tracking micro-scale changes requires sub-meter accuracy to distinguish fine details. Step-by-step Explanation:
• Analysis of Options (A, B, and D): Studying continental weather patterns, creating regional maps at a $1:50,000$ scale, or estimating countrywide demographic statistics are macro-level tasks. These operations cover broad geographical areas where medium-to-coarse resolution data (e.g., $10\text{m}$ to $30\text{m}$ per pixel) is sufficient.
• Analysis of Option (C): Monitoring parcel-level property boundaries or identifying unauthorized structures involves examining small spatial features, such as minor illegal structural extensions, room additions, or encroaching boundary walls. To confirm these violations legally and accurately, planners require high-resolution imagery (e.g., $30\text{cm}$ to $50\text{cm}$ per pixel) to clearly see individual buildings and narrow property lines. Thus, tracking parcel-level modifications creates a critical need for high-resolution satellite imagery.