Question

Which of the following GPS receivers is most often used by government agencies and researchers, due to its accuracy within a metre?

• A. Recreational GPS
• B. Survey GPS
• C. Mapping GPS
• D. Military GPS

Hint:

Think of it like a ladder: Recreational (15m) $\rightarrow$ Mapping (1m) $\rightarrow$ Survey (1cm).

Answer 1

The Correct Option is C

Step 1: Concept
GPS receivers are classified based on their level of accuracy and their intended professional application.

Step 2: Meaning
We need to identify the receiver grade that specifically provides "sub-meter" (within a metre) accuracy and is widely used for resource mapping by agencies.

Step 3: Analysis

• Recreational GPS: Low accuracy (10-15 meters), used by hikers and consumers.
• Survey GPS: Extremely high accuracy (sub-centimeter to millimeter), used by professional surveyors for property boundaries.
• Mapping GPS: High accuracy (sub-meter, usually less than 1 meter), frequently used by government agencies, environmental researchers, and utility companies to map assets and natural resources.

Step 4: Conclusion
Mapping grade GPS is the specific category matching the sub-meter requirement for government/research applications. Final Answer: (C)