1) In a digital terrain model, values for elevation are given as Question options: 2) A commonly used vertical datum is Question options: the core of...

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

Question options:

H.

T.

E.

Z.

2) A commonly used vertical datum is

Question options:

the core of the Earth.

the north pole.

high tide.

mean sea level.

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

Question options:

bands.

contours.

digital line graphs.

collars.

4) The SRTM (Shuttle Radar Topography Mission) performed which of the following?

Question options:

Used radar waves from space to map the terrain surfaces of the Earth

Used radio waves from space to make full three-dimensional model of the Earth

Used both radar and sonar to make map of the Earth's surface (and the objects on the surface)

Used radar to map the heights of the oceans to make new permanent vertical datum

5) LIDAR uses which of the following to produce a digital terrain model?

Question options:

Satellite imagery

Radar waves

GPS

Laser beams

6) The accuracy of a LIDAR model of terrain is about

Question options:

30 meters.

15 meters.

1 meter.

15 centimeters.

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

Question options:

viewshed.

slope aspect.

slope.

perspective.

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

Question options:

perspective.

viewshed.

slope.

slope aspect.

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

Question options:

The elevation values are adjusted to fit with the different elevation values of the NED.

The horizontal scale of the model is altered to accommodate the scale of related satellite imagery.

A satellite image is draped over the terrain, making it appear more realistic.

The vertical scale is made larger than the horizontal scale.

10) Extruding a polygon will turn it into a...

Question options:

block.

multipatch.

wall.

line.

11) Graphics that can be applied to the faces of an object to provide a more realistic appearance are...

Question options:

omni-objects.

links.

textures.

smartshapes.

12) KML and KMZ files are the native file formats used to work with 3D objects in...

Question options:

Google Earth.

ArcScene

ArcGlobe

SketchUp.

13) Viewing an image that is offset in both the color red and the color blue that enables a "3D" style effect is an example of...

Question options:

CityEngine.

anaglyph.

GeoWall

stereovision.

14) Which of the following operations would best allow you to place 3D buildings at their proper height on the terrain (e.g., the terrain is 900 ft above sea level, you want the building to sit on the terrain, not float above or below it)?

Question options:

Extrusion

Applying base heights

Offsetting

Vertical exaggeration