Deck 9: How to Perform Geoprocessing in Arcgis

Question 1

The National Agriculture Imagery Program (NAIP)produces

A)high-quality photos exclusively of all farms in the United States.
B)yearly CIR images used exclusively for crop monitoring.
C)very detailed oblique images of all major U.S.cities.
D)orthoimages for the entire United States.

Answer 1

D

Question 2

Explain how the height of a flagpole (falling on level terrain)can be calculated by measuring the length of its shadow in an aerial photo.

Answer 2

The assumption is that the angle of the sun will remain constant throughout the photo.By knowing the real-world height of another object (a small tower)and being able to measure the length of this new object's shadow in the aerial photo,the angle of the Sun can be computed via the trigonometric formula (tan a = h/L),where h is the height of the tower and L is the length of its shadow.By taking the value for the Sun's angles (tan a)and the length of the flagpole's shadow,its height can be found by plugging both of these values into the (tan a = h/L)equation and solving for h.

Question 3

Photogrammetry describes the

A)method of changing an orthophoto to a non-orthophoto.
B)process of obtaining measurements from an aerial photo.
C)scale of an aerial photo.
D)interpretation of items in an aerial photo.

Answer 3

B

Question 4

What type of aerial photo is taken when the camera is placed at an angle?

A)Photogrammetric photo
B)Rectified photo
C)Oblique photo
D)Nadir photo

Question 5

Unmanned Aerial Vehicles (UAVs)are flown

A)at more than 80,000 feet above the ground.
B)at the edge of the Earth's atmosphere.
C)via remote control from the ground.
D)by a robot system at the controls.

Question 6

The physical arrangement of items in an aerial image refers to

A)pattern.
B)texture.
C)site.
D)tone.

Question 7

A digital orthophoto quad (DOQ)covers

A)3.75 minutes of latitude by 3.75 minutes of longitude of distance.
B)the size of one-quarter of the distance shown on a DOQQ.
C)15 minutes of latitude by 15 minutes of longitude of distance.
D)the size of four times the distance shown on a DOQQ.

Question 8

The center of an aerial photo is referred to as its

A)ortho point.
B)nadir point.
C)photogrammetric point.
D)principal point.

Question 9

In a color infrared photo,

A)red energy is displayed as the color green,green energy is displayed as the color blue,and near-infrared energy is displayed as the color red.
B)red energy is displayed as the color red,green energy is displayed as the color green,blue energy is displayed as the color blue,and near-infrared energy is displayed as the color black.
C)near-infrared energy is displayed in the color red,while the other colors (red,green,and blue)are displayed with shades of grey.
D)only near-infrared energy is displayed,shown in shades of grey.

Question 10

Aerial photography was first obtained from an aircraft in

A)1903,from the first flight at Kitty Hawk.
B)1908,from a Wright Brothers plane.
C)1914,from a German World War I reconnaissance plane.
D)1940,from a British reconnaissance mission.

Question 11

The "leaning" of tall objects away from the center point of an aerial photo is due to

A)orthorectification.
B)relief displacement.
C)the camera's field of view.
D)the plane's flying height.

Question 12

The differences of a certain tone throughout an aerial image refers to

A)texture.
B)association.
C)size.
D)pattern.

Question 13

The first aerial photograph was taken in

A)1826,from a kite.
B)1858,from a balloon.
C)1876,from a glider.
D)1903,from an aircraft.

Question 14

What is the difference between an orthophoto and a regular aerial photo?

Question 15

The U-2 aircraft's remote sensing capabilities were especially proven during which of the following?

A)The San Francisco earthquake
B)World War I
C)World War II
D)The Cuban Missile Crisis

Question 16

A photo taken from a camera looking straight down at the ground is a

A)vertical photo.
B)oblique photo.
C)scale photo.
D)photogrammetric photo.

Question 17

In 1906,aerial photography of "San Francisco in ruins" was taken by

A)a series of balloons.
B)a series of kites.
C)a fleet of gliders.
D)the U-2 spy plane.