Which of the following best describes DEM (Digital Elevation Model)?
A. A model showing underground structures
B. A raster dataset representing ground surface elevations
C. A vector dataset of geological faults
D. A map of soil types
Answer: Option B
Solution (By Examveda Team)
DEM is a raster representation of terrain elevations used extensively in hydrological modeling, slope analysis, and construction planning.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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