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Correlation 2 > Remote Sensing & GIS > Flashcards

Remote Sensing & GIS Flashcards

1
Q

Combines location and information about the location

Ability to analyze information

Analyze as many layers of information at ocne

Can overlay different spatial information at once

A

GIS

Geographic Information System

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2
Q

information associated with an underlying geography or description of location

A

Spatial Information

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3
Q

the science that deals with the construction, use, and principles behind maps and map use

A

Cartography

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4
Q

Imaginary lines that runs horizontally

69 miles or 111 km apart

A

Latitude

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5
Q

Imaginary lines that runs vertically and also known as meridians

(69 miles or 111 km apart)

A

Longitude

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6
Q

0 degree of Longitude is located at ______ and continues 180 degrees east
and west where they meet and form the
International Date line in the Pacific Ocean

A

Greenwich England

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7
Q

It provides essential information for the map reader

A

Map Legend

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8
Q

Ratio between distance on a paper map and distance of the same stretch in actual terrain

A

Map Scale

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9
Q

The accuracy with which a given map scale can depict the location and shape of map features

A

Resolution

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10
Q

the minimum size of objects that can be detected by a sensor system

A

Spatial Resolution

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11
Q

is used to portray all or part of round Earth on a flat surface map

A

Map Projection

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12
Q

Map Projection that has

equally spaced longitudes
unequally spaced latitudes
scale is true along equator
shape and scale distortions increase near poles
shows true direction
UTM
A

Cylindrical Projection

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13
Q

Map projection that results from projecting a spherical surface onto a cone

A

Conic Projection

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14
Q

Map projection resulting from projecting a spherical surface onto a plane

Best for polar or circular regions

A

Azimuthal (Planar) Projection

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15
Q

used to represent the locations of geographic features, imagery, and observation such as GPS locations within a common geographic framework

A

Reference System

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16
Q

Map projection best for mid-latitudes with an East-West orientation like Canada

A

Conic Projection

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17
Q

a combination of factors; ellipsoud, geoid, coordiate system and projection that identify a point on a sphere and on a two dimensional representation of the sphere

A

Spatial Reference Framework

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18
Q

the science of measuring the earth

A

Geodesy

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19
Q

the science of identifying and measuring specific locations on the earth

A

Surveying

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20
Q

slight non-spherical object of the size and shape of the earth

A

Spheroid

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21
Q

a mathematical model of the size and shape of the earth

A

Ellipsoid

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22
Q

a theoretical surface generally defined as mean sea level. Used as the basis for a vertical datum and as reference for a horizontal datum.

A

Geoid

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23
Q

a spheroid used as an (X,Y) reference to all points on the real globe

A

Horizontal Datum

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24
Q

level surface to which heights (elevation) are referenced

A

Vertical Datum

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25
Q

2 Types of Coodinate System

A

Global or Spherical Coordinate System

Projected Coordinate System

26
Q

based on a map
projection, such as transverse Mercator, which
provide various mechanisms to project maps of the
earth’s spherical surface onto a two-dimensional
Cartesian coordinate plane.

A

Projected Coordinate System

27
Q

System that uses such as longitude-latitude. These are often referred as Geographic Coordinate System

A

Global or Spherical Coordinate System

28
Q

is a geodetic datum first defined in 1911 and is suitable

for use in Philippines - onshore

A

Luzon 1911

29
Q

Luzon 1911 references the _______ and the
________.

origin is Fundamental point:

A

Clarke 1866 ellipsoid
Greenwich prime meridian.

Hinanggayon, Marinduque

30
Q

is a homogeneous national network of geodetic control
points (GCPs), marked by concrete monuments or
mojons, that has been established using Global
Positioning System (GPS) technology – NAMRIA

A

PRS92 or the Philippine Reference System of 1992 i

31
Q 
Zone I 117° 
Zone II 119° 
Zone III 121° 
Zone IV 123° 
Zone V 125°
A

Zone I 117° E Area W of 118 E
Zone II 119° E Palawan and Calamian Islands
Zone III 121° E Luzon (except SE), Mindoro
Zone IV 123° E SE Luzon, W Mindanao
Zone V 125° E E Mindanao, Bohol, Samar

32
Q 
Single square cells
• Each cell will have a value
corresponding to its land cover
type.
• Represents features as a matrix
of cells in continuous space.
A

Raster

33
Q

Types of Data Model

A

Raster

Vector

34
Q

are stored as individual X, Y coordinates or as individual column. Row cell entries in a grid

A

Points

35
Q

are stored as a set of mathematically connected X, Y coordinates or as a set of connected grid cells

A

Lines

36
Q

are stored as a set of mathematically connected X, Y coordinates defining the boundary or as a set of contiguous cells defining the interior

A

Areas

37
Q

Those collected in digital format specifically for use in a GIS Project by direct measurement

A

Primary Sources

38
Q

those reused from earlier studies or obtained from other systems

A

Secondary Sources

39
Q

It is the measure of totality of

features.

A

Data Completeness

40
Q

can be termed as the
degree of details that are displayed on a uniform
space

A

Data Precision:

41
Q

This can be termed as the
discrepancy between the actual attributes value and
coded attribute value

A

Data Accuracy

42
Q

can be termed as

the absence of conflicts in a particular database.

A

Data Consistency

43
Q

means gathering
information about something (object) without
actually being in any contact with it.

A

Remote Sensing

44
Q

Why Remote Sensing?

A

to see differences over time
to measure sizes, areas, depths, and heights; and in general
to acquire information that is difficult to acquire by other means

45
Q

A __________ in orbit around the earth has a sensor
which scans the Earth’s surface measuring the
amount of light reflected/transmitted.

A

satellite

46
Q

is one in which the satellite is always in
the same position with respect
to the rotating Earth

A

Geostationary Orbit

47
Q
  • An orbit that goes over
    both the North and the South
    Pole is called a ____________.
A

Polar orbit/Sun-Synchronous Orbit

48
Q

A ________ is a device t hat measures a certain energy
level of the electromagnetic spectrum and converts it
into a signal which can be read by an instrument

A

Sensor

49
Q

is generated by feature extraction from high

resolution stereo satellite imagery

A

DEM

50
Q

uses inSAR which measures Earth’s elevation with two
antennas. In only a couple days, ______ has collected
one of the most accurate digital elevation models of
Earth.

A

SRTM

Shuttle Radar Topography Mission

51
Q

is an active sensor that measures ground height. Using light from an airplane or helicopter platform, it measures the time it takes to bounce back to the sensor. From this, you can create Digital Surface Models which is useful in forestry

A

Light detection and Ranging (LiDAR)

52
Q

Data to generate Digital Elevation Models (DEMs). This
radar mapping technology is an effective tool for
collecting data under challenging circumstances such as
cloud cover, extreme weather conditions, rugged terrain,
and remote locations.

A

IfSAR/InSAR

53
Q

GIS Application

A 
Groundwater
Ground Hazard
Regional Geology Mapping
Fault line Mapping
Earthquake Movement
54
Q

Are satellites specifically designed for Earth
observation from orbit, similar to spy satellites but
intended for non-military uses such as
environmental monitoring, meteorology, map
making etc

A

Earth observation satellites

55
Q

is an object-detection system that uses radio waves to
determine the range, angle, or velocity of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain.

• A radar system consists of a transmitter producing
electromagnetic waves in the radio or microwaves domain, a transmitting antenna, a receiving antenna (often the same antenna is used for transmitting and receiving) and a receiver and processor to determine properties of the object(s).

A

RAdio Detection And Ranging

RAdio Direction And Ranging

56
Q

Is a remote sensing method that uses light in the form of a pulsed laser to measure ranges (variable distances) to the Earth. These light pulses—combined with other data recorded by the airborne system— generate precise, three dimensional information about the shape of the Earth and its surface characteristics.

A

Light Detection and Ranging

57
Q

Two types of LIDAR are

_____ LIDAR typically uses a near-infrared laser to
map the land

LIDAR uses water-penetrating green light to
also measure seafloor and riverbed elevations

A

Topographic

Bathymetric

58
Q

Is helpful for exploring and mapping the ocean because sound waves travel farther in the water than do radar and light waves.

A

Sound Navigation and Ranging

59
Q

emit an acoustic signal or pulse of
sound into the water. If an object is in the path of the sound pulse, the sound bounces off the object and returns an “echo” to the sonar transducer. If the transducer is equipped with the ability to receive signals, it measures the strength of the signal.

A

Active Sonar

60
Q 
are used primarily to detect noise from
marine objects (such as submarines or ships) and marine animals like whales. it does not
emit its own signal, which is an advantage for military vessels that do not want to be found or for scientific missions that concentrate on quietly “listening” to the ocean. Rather, it only detects sound waves coming towards it.
A

Passive Sonar

Correlation 2 (19 decks)

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