Introduction Flashcards
What is resolution?
It refers to the pixel size of an image and it clarity
Data depth refers to _________.
Precision.
What is the difference between real and integer storage?
Real uses more bit storage than integer.
Real: 32 bit
Integer: 8 bit
Remote sensing systems record __________ energy.
Electromagnetic
Different types of sensors record different _________.
Wavelengths
What is an active system?
A system that generates its own energy, it can emit energy and record the return signal.
What is the advantage of active sensing?
It doesn’t rely on sunlight so it isn’t limited by daylight.
What are some examples of remote sensing, and what wavelengths do they use? (3)
LIDAR- uses visible and infrared
RADAR- microwave
SONAR and seismic- long sound waves
What is a passive system?
Systems that rely on outside energy sources. The most common energy source is the sun. Usually using visible wavelengths .
What are some examples of a passive system.
Aerial photography, multi spectral scanners, thermal sensors
Remote sensing is an important tool in ____________.
Resource management
What are four examples of resource management?
Population spread and development
Aral Sea
Fisheries
Forestry
Define Remote Sensing.
A form of collecting information about an object without coming into physical contact with it.
