Introduction Flashcards Preview

Geography 228 > Introduction > Flashcards

Flashcards in Introduction Deck (13):
1

What is resolution?

It refers to the pixel size of an image and it clarity

2

Data depth refers to _________.

Precision.

3

What is the difference between real and integer storage?

Real uses more bit storage than integer.
Real: 32 bit
Integer: 8 bit

4

Remote sensing systems record __________ energy.

Electromagnetic

5

Different types of sensors record different _________.

Wavelengths

6

What is an active system?

A system that generates its own energy, it can emit energy and record the return signal.

7

What is the advantage of active sensing?

It doesn't rely on sunlight so it isn't limited by daylight.

8

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

9

What is a passive system?

Systems that rely on outside energy sources. The most common energy source is the sun. Usually using visible wavelengths .

10

What are some examples of a passive system.

Aerial photography, multi spectral scanners, thermal sensors

11

Remote sensing is an important tool in ____________.

Resource management

12

What are four examples of resource management?

Population spread and development
Aral Sea
Fisheries
Forestry

13

Define Remote Sensing.

A form of collecting information about an object without coming into physical contact with it.