Consider the following statements regarding remote sensing surveys : 1. Different types of land use are distinguishable on images. 2. Most images lack the horizontal perspective. 3. For surveys of small areas, the cost of mobilizing a remote sensing mission may be uneconomical. Which of the above statements is/are correct ?
- A1 and 2
- B2 and 3Correct
- C2 only
- D3 only
Solution
Concept
Limitations of remote sensing surveys
Step-by-step solution
1. Statement 1 is an advantage; the list here concerns limitations, and similar land uses can be confused on images. 2. Images are vertical and lack horizontal perspective (limitation). 3. Mobilising a mission for a small area is uneconomical (limitation).
Explanation
Remote sensing is best suited to large areas. Vertical images give no side view, and the setting-up cost is too high for small surveys.
Why the other options are wrong
Statement 1 is treated as incorrect because land-use classes are not always distinguishable.
Shortcut
Remote sensing: good for large areas, vertical views.
Correct answer: B) 2 and 3