Deck 13: How to Use Remotely Sensed Imagery in Arcgis

Question 1

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

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

Answer 1

C

Question 2

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 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

Answer 2

B

Question 3

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 3

D

Question 4

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

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

Question 5

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

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

Question 6

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 7

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 8

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 9

The vertical accuracy of a LIDAR model of terrain is about

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

Question 10

Beyond digital terrain models,LIDAR can also be used to determine

A)building heights.
B)the types of leaves on trees.
C)the health of vegetation.
D)sub-surface soil types.

Question 11

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

A)two-dimensional model.
B)2.5-dimensional model.
C)three-dimensional model.
D)e-dimensional model.

Question 12

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

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

Question 13

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

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

Question 14

The SRTM performed which of the following?

A)Used radar waves from space to map the terrain surfaces of Earth
B)Used radio waves from space to create a full three-dimensional model of Earth
C)Used both radar and sonar to create a map of 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 15

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

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

Question 16

A commonly used vertical datum is

A)the core of Earth.
B)the North Pole.
C)high tide.
D)mean sea level.

Question 17

The current generation of topographic maps produced by the USGS are

A)printed 1:24000 topoquads.
B)GeoPDF versions of US Topos.
C)high-resolution DRG products.
D)3D contours available via a mobile app.