Which of the following best describes the Normalized Difference Water Index (NDWI)?
A. Index for assessing vegetation health
B. Index for detecting water bodies using near-infrared and green bands
C. Index for mapping urban areas
D. Index for soil moisture content
Answer: Option B
Solution (By Examveda Team)
NDWI helps in identifying surface water by contrasting near-infrared and green spectral bands.This aids in flood mapping and water resource management.This Question Belongs to Geological Engineering >> Remote Sensing And GIS In Geological Engineering
What is the primary principle behind remote sensing?
A. Collecting data by direct contact
B. Observing Earth from a distance using sensors
C. Drilling to collect soil samples
D. Using underground radar
Which of the following is an active remote sensing technique?
A. Aerial photography
B. LiDAR (Light Detection and Ranging)
C. Thermal infrared imaging
D. Multispectral scanning
Which GIS component is responsible for spatial data analysis?
A. Hardware
B. Software
C. Data
D. People
In remote sensing, what does spectral resolution refer to?
A. Size of the area covered
B. Ability to distinguish between different wavelengths
C. Number of pixels in the image
D. Time between image acquisitions
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