Deck 13: Digital Landscaping

Question 1

By applying vertical exaggeration to a model,which of the following will occur?

A)The elevation values are adjusted to fit with the different elevation values of the NED.
B)The horizontal scale of the model is altered to accommodate the scale of related satellite imagery.
C)A satellite image is draped over the terrain,making it appear more realistic.
D)The vertical scale is made larger than the horizontal scale.

Answer 1

D

Question 2

A commonly used vertical datum is

A)the core of the Earth.
B)the north pole.
C)high tide.
D)mean sea level.

Answer 2

D

Question 3

Only being able to show one elevation value for each x/y pair of coordinates is a conceptualization of a(n)

A)2-dimensional model.
B)2.5-dimensional model.
C)3-dimensional model.
D)E-dimensional model.

Answer 3

B

Question 4

The accuracy of a LIDAR model of terrain is about

A)30 meters.
B)15 meters.
C)1 meter.
D)15 centimeters.

Question 5

A 1:24000 scale topographic map will show how much geographic area?

A)7.5 minutes of latitude by 7.5 minutes of longitude
B)24,000 feet by 24,000 feet
C)15 miles by 15 miles
D)8000 meters by 8000 meters

Question 6

The SRTM performed which of the following?

A)Used radar waves from space to map the terrain surfaces of the Earth
B)Used radio waves from space to create a full three-dimensional model of the Earth
C)Used both radar and sonar to create a map of the Earth's surface (and the objects on the surface)
D)Used radar to map the heights of the oceans to create a new permanent vertical datum

Question 7

Imaginary lines on a map that represent areas of constant elevation are

A)bands.
B)contours.
C)digital line graphs.
D)collars.

Question 8

In hillshading,the user would set which two paramaters?

A)The vertical datum and the grid cell resolution
B)The altitude of the sun and its location in relation to the Earth
C)The vertical accuracy of the model and the steepness of the terrain
D)The angle of the sun's rays and the vertical exaggeration of the model

Question 9

A digital terrain model that consists of regularly sampled points of elevation is a

A)DLG.
B)TIN.
C)DEM.
D)TEd.

Question 10

In a digital terrain model,values for elevation are given as

A)E.
B)H.
C)T.
D)Z

Question 11

A measurement of the rate of elevation change at a location is

A)viewshed.
B)slope aspect.
C)slope.
D)perspective.

Question 12

Small-scale maps would use

A)a wider contour interval than a large scale map.
B)a narrower contour interval than a large scale map.
C)the same contour interval as a large scale map.
D)no contour intervals due to the small scale of the map.

Question 13

A DRG is a(n)

A)scanned version of a USGS topo map.
B)digitized version of features on a USGS topo map.
C)remotely sensed image overlaid on a USGS topo map.
D)aerial photo that covers the same area as a USGS topo map.

Question 14

A determination of the direction of the steepest slope for an area is

A)perspective.
B)viewshed.
C)slope.
D)slope aspect.

Question 15

LIDAR uses which of the following to create a digital terrain model?

A)Satellite imagery
B)Radar waves
C)GPS
D)Laser beams