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WorksheetsLiDAR SEAB 4013
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
What does LiDAR stand for?
a)
Light Detection and Reflection
b)
Laser Distance and Ranging
c)
Light Detection and Ranging
d)
Laser Direction and Rotation
2.
LiDAR distance measurement is based on:
a)
Angle measurement only
b)
Signal strength
c)
Time taken for the laser pulse to travel to the target and return
d)
Height difference between points
3.
Why is the travel time divided by two in the LiDAR distance equation?
a)
The laser travels at half the speed of light
b)
The laser pulse travels to the object and back to the sensor
c)
Reflection reduces the distance
d)
Two pulses are emitted simultaneously
4.
Compared to conventional surveying, LiDAR mainly differs in terms of:
a)
Equipment size
b)
Data density and spatial coverage
c)
Coordinate system used
d)
Survey control requirements
5.
Which LiDAR-derived product represents the bare-earth surface?
a)
Raw point cloud
b)
Digital Surface Model (DSM)
c)
Digital Terrain Model (DTM)
d)
Orthophoto
6.
High point density in LiDAR data is important because it:
a)
Reduces file size
b)
Improves terrain and feature representation
c)
Eliminates the need for data processing
d)
Increases survey duration
7.
Which LiDAR output is commonly used as a base dataset for civil engineering analysis?
a)
Intensity image
b)
Raw GPS data
c)
Digital Terrain Model (DTM)
d)
Scanner calibration report
8.
In earthwork planning, LiDAR-derived DTM is mainly used to:
a)
Measure concrete volume
b)
Estimate cut-and-fill volumes
c)
Select construction materials
d)
Monitor traffic flow
9.
LiDAR is particularly useful for drainage and flood analysis because it provides:
a)
Rainfall intensity data
b)
Accurate terrain slope and flow direction
c)
Hydraulic model outputs
d)
Future flood prediction
10.
In natural disaster management, LiDAR is valuable because it can:
a)
Prevent natural disasters
b)
Replace emergency response teams
c)
Rapidly capture terrain and infrastructure changes after events
d)
Eliminate all field investigations
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