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What is Parallax > El's Qs (Annotated notes) > Flashcards

El's Qs (Annotated notes) Flashcards

1
Q

Not all parts of the Philippines has red sunsets because…

A

there is not enough wavelength to scatter wavelength.

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2
Q

Something that is unique to something

A

index

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3
Q

bending of light when it travels from one medium to another

A

refraction

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4
Q

Theory that shows relationship of wavelength and frequency

A

wave theory

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5
Q

Are the GNSS (Global Navigation
satellite system) remote sensing?

A

No.
Explanation: they send signal to the receiver on the earth which tells the location in the speed of light

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6
Q

Why should there be more than two datasets when studying a phenomenon?

A

to compensate the error from your back bearing
process of triangulation:
find a distinguishable feature
get the back bearing

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7
Q

Theory that states that wavelength has matter and density

A

particle theory

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8
Q

measuring and gathering data without contact

A

remote sensing

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9
Q

why do we get data?

A

to get information

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10
Q

T or F: data analysis needs to be checked and validated

A

T because it’s procured remotely

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11
Q

DTM (Digital Topography Model) is a terrain without anything so it is sometimes called…

A

bald earth

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12
Q

simplistic representation of data

A

diagram

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13
Q

T or F: increase of temperature would decrease the radiant energy raised to the power of four

A

F increase the radiant energy. Change in radiant energy will drastically change the temperature

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14
Q

T or F:
more energy = less information

A

F less energy = less information
Explanation: the longer path, chances are, data is lesser than that of ones with shorter path length

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15
Q

What corrections should you apply to raw data from the sensor?

A

Geographical, Atmospherical, Geological

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16
Q

T or F: remote sensing is limited to satellites

A

F hand held sensors are also considered

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17
Q

Simulates how gamma rays are naturally in the air

A

Gamma ray simulator

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18
Q

T or F: there are natural gamma ray emission

A

T

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19
Q

the number from the field that you get from your sensor, satellite image

A

data
ex: DEM

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20
Q

pattern recognition produces…

A

information

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21
Q

getting things useful from datasets, useable to the end user

A

information

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22
Q

T or F: remote sensing requires to be able to recognize the pattern

A

T

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23
Q

Types of data used in remote sensing

A
  • Variations in force distributions
  • Acoustic wave distributions
  • Electromagnetic distributions
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24
Q

representation if earth was only covered by oceans

A

Geoid

25
Q

T or F: electromagnetic energy sensor only measures the energy, not the light

A

T

26
Q

use for viewing and interpreting the data sets

A

data analysis

27
Q

airborne and space-borne, counts how many energy it receives, it has light but also energy, it measures the energy not the light

A

electromagnetic energy sensor

28
Q

the electromagnetic remote sensing process is used for…

A

inventory, mapping, and monitoring earth resources

29
Q

use sensors to record EM reflection and emission, doesn’t concern the geologist (instrumentation, etc.)

A

data acquisition

30
Q

T or F: Remote sensing = non contact, need to have reference point, actual in-contact data

A

T

31
Q

mathematical relationship between features

A

topology

32
Q

clustering of the high and low values

A

heat map

33
Q

diagram that shows the frequency and direction

A

rose diagram

34
Q

why is there differential transmittance?

A

lens is not ideal

35
Q

non uniform exposure in the focal plane due to variation in focal plane

A

exposure falloff

36
Q

T or F: further from image = higher exposure

A

T

37
Q

what causes vignette

A

shadows

38
Q

selects which wavelengths of energy reflected from a scene to reach the image plane

A

filters

39
Q

absorb wavelengths that do not benefit the study

A

absorption filters

40
Q

T or F: there is actual low pass filters

A

F
explanation: interference filter - actually a low pass filter

41
Q

why is a lower f-stop used for low light?

A

low light reaches the image plane. aperture of camera has greater effect on the volume of light that comes in.

42
Q

T or F: only emitted EM energy are analyzed to provide information

A

F
The emitted and reflected
EM energy from the air-
borned and spaceborne
sensors are analyzed to
provide information.

43
Q

high reflected radiation energy produces:
A. narrow
B. wide
image

A

B. wide

44
Q

which is more important in RS?
a. specular reflection
b. diffused reflection

A

b. diffused

45
Q

what causes hotspots?

A

hotspot happens when sun and zenith angles of sensor is the same direction

46
Q

why is true color not deterministic and deceiving in RS?

A

due to broad morphological features

47
Q

used for highlighting the target, contain more info for analyzing images

A

false color image

48
Q

if the slope is facing the light source, it will be:
a. lighter
b. darker

A

a. lighter
it will be non uniform due to slope

49
Q

what perspective view is good for presenting data?

A

Three-dimensional perspective view

50
Q

Terrain is…

A

ground surface

51
Q

sharper v-shape contours mean…

A

deeper landscape

52
Q

DSM - DTM = ?

A

CHM (canopy height model)

53
Q

Is digital Terrain Model (DTM) is processed data?

A

Yes, it’s a mathematical algorithm that averages the value of the data

54
Q

why is there no collaboration between satellites from different countries?

A

different signal, different receivers that have different clocks, different orbital

55
Q

organized information that has spatial data

A

geodatabase

56
Q

are the datasets in the geodatabase relational?

A

yes. there is a predefined condition on how one dataset is connected to another. there is a primary key that connects the data and these are unique. but a foreign key can be used which can be duplicated

57
Q

a camera where you can adjust the aperture

A

SLR

58
Q

main use of aerial photography

A

common as it covers most of the land areas, versatile (can be used for different analysis, high res, archived since it’s from film), economical (camera, aircraft, develop film, aerial photo), multiple users can use aerial photos

What is Parallax (7 decks)

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