Remote Sensing Flashcards
(26 cards)
What is remote sensing?
The acquisition of information about an object or phenomenon without making physical contact.
True or False: Remote sensing can only be conducted from aircraft.
False
Fill in the blank: Remote sensing can be divided into ____ and ____ sensing.
active, passive
What is passive remote sensing?
The detection of natural radiation emitted or reflected by the object of interest.
What is active remote sensing?
The use of emitted energy, such as radar or laser, to measure properties of the target.
Which of the following is an example of passive remote sensing? A) Radar B) Satellite imagery C) Lidar
B) Satellite imagery
What type of energy does Lidar use?
Laser light
What is the primary purpose of remote sensing?
To gather data about the Earth’s surface and atmosphere.
True or False: Remote sensing can only be used for environmental monitoring.
False
What is a common application of remote sensing in agriculture?
Crop health monitoring
Fill in the blank: Remote sensing data can be analyzed using ____ techniques.
GIS (Geographic Information System)
What does GIS stand for?
Geographic Information System
Which satellite is known for its role in Earth observation and remote sensing?
Landsat
What is the significance of spatial resolution in remote sensing?
It defines the smallest object that can be detected by the sensor.
Multiple choice: Which of the following is NOT a type of remote sensing? A) Optical B) Thermal C) Chemical D) Radar
C) Chemical
True or False: Remote sensing can be used to monitor climate change.
True
What is spectral resolution?
The ability of a sensor to measure specific wavelengths of light.
Fill in the blank: Remote sensing can provide data on ____ changes over time.
spatial and temporal
What is the difference between aerial photography and satellite imagery?
Aerial photography is taken from aircraft, while satellite imagery is captured from satellites.
What is a common use of remote sensing in urban planning?
Land use mapping
True or False: Remote sensing technology has no impact on disaster management.
False
What does NDVI stand for in remote sensing?
Normalized Difference Vegetation Index
What is the purpose of NDVI?
To assess vegetation health and density.
Multiple choice: Which sensor is typically used for thermal remote sensing? A) Multispectral B) Hyperspectral C) Thermal infrared
C) Thermal infrared
