Extended Tools In 3D Visualization_book 6
3D data ypes, display, and visualization
Data aquisition and Processing
Coverting 2d to 3D
Displaying non elevation data in 3D
Surface Analysis
Global Visualization and Analysis
Animation and Exporting Projects
Questions and Answers
- 1.
The ArcGIS extension program that is designed to display elevation and other data layers that have Z values associated with the features is called
- A.
3D Analyst
- B.
ArcToolbox
- C.
Image Analysis
- D.
Spatial Analyst
Correct Answer
A. 3D AnalystExplanation
The correct answer is 3D Analyst. This ArcGIS extension program is specifically designed to display elevation and other data layers that have Z values associated with the features. It allows users to create, visualize, and analyze 3D data, making it a powerful tool for working with elevation and terrain data.Rate this question:
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- 2.
The ArcGIS program used to view three-dimensional data with 3D Analyst is called
- A.
ArcMap
- B.
ArcScene
- C.
ArcToolbox
- D.
Explorer
Correct Answer
B. ArcSceneExplanation
ArcScene is the correct answer because it is the specific ArcGIS program that is used to view three-dimensional data with 3D Analyst. ArcMap is another ArcGIS program, but it is primarily used for two-dimensional mapping. ArcToolbox is a collection of tools within ArcGIS that can be used for various geoprocessing tasks. Explorer is a mobile app for accessing and exploring maps and data on mobile devices.Rate this question:
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- 3.
The option included in Scene Properties that allows you to amplify the variations in elevation of a surface to make the variation more noticeable is called
- A.
Amplification
- B.
Augmentation
- C.
Extending
- D.
Vertical Exaggeration
Correct Answer
D. Vertical ExaggerationExplanation
Vertical exaggeration is the correct answer because it accurately describes the option included in Scene Properties that amplifies the variations in elevation of a surface. By increasing the vertical exaggeration, the differences in elevation become more noticeable and exaggerated, allowing for a better understanding and visualization of the surface's topography.Rate this question:
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- 4.
A data format that displays elevation data using nodes, lines and faces is called
- A.
Grid
- B.
Raster
- C.
Terrestrial Integrated Network
- D.
Triangulated Irregular Network
Correct Answer
D. Triangulated Irregular NetworkExplanation
A Triangulated Irregular Network (TIN) is a data format that represents elevation data using nodes, lines, and faces. It is a type of spatial data structure that divides a terrain into a series of non-overlapping triangles. Each triangle is defined by three nodes, which represent elevation points. The lines connect these nodes, and the faces represent the triangles. This format is commonly used in geographic information systems (GIS) and digital elevation models (DEM) to represent terrain surfaces and analyze elevation data.Rate this question:
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- 5.
The most common type of elevation data used in 3D display and analysis is
- A.
DEMs
- B.
TINs
- C.
Nodes
- D.
GECs
Correct Answer
A. DEMsExplanation
The most common type of elevation data used in 3D display and analysis is DEMs (Digital Elevation Models). DEMs are raster representations of the Earth's surface, where each cell in the grid contains elevation information. They are widely used in various applications such as topographic mapping, hydrological modeling, and terrain analysis. DEMs provide a detailed and accurate representation of the terrain, making them the preferred choice for 3D visualization and analysis.Rate this question:
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- 6.
The option that allows you to “pull” features up to a certain height in a 3D scene by assigning a Z value in Layer Properties is called
- A.
Animation
- B.
Extrusion
- C.
Projection
- D.
Scaling
Correct Answer
B. ExtrusionExplanation
Extrusion is the correct answer because it refers to the option that allows you to "pull" features up to a certain height in a 3D scene by assigning a Z value in Layer Properties. This technique is commonly used in 3D modeling and computer graphics to create depth and dimensionality by extending a 2D shape or object along its normal axis.Rate this question:
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- 7.
Feature data layers that have Z values (height or elevation) included in their attributes are called
- A.
2D Shapefiles
- B.
3D Shapefiles
- C.
Contours
- D.
TINs
Correct Answer
B. 3D ShapefilesExplanation
3D Shapefiles are feature data layers that include Z values, which represent height or elevation, in their attributes. This means that the Shapefile contains information about the vertical dimension in addition to the usual x and y coordinates. This allows for the representation of three-dimensional objects or terrain in GIS software.Rate this question:
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- 8.
The interpolation method that selects the closest nodes that form a convex hull around the interpolation point and then weights their values by the proportionate area is called
- A.
Inverse Distance Weighted Method
- B.
Kriging Method
- C.
Spline Method
- D.
Natural Neighbors Method
Correct Answer
D. Natural Neighbors MethodExplanation
The natural neighbors method is an interpolation method that selects the closest nodes that form a convex hull around the interpolation point. It then weights their values by the proportionate area. This method is used to estimate values at unknown locations based on the values of surrounding known points. It is particularly useful when dealing with irregularly spaced data points and can provide more accurate results compared to other interpolation methods.Rate this question:
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- 9.
Lines created that represent elevation by connecting points with the same elevation values are called
- A.
Contours
- B.
Hillshades
- C.
Projections
- D.
Slopes
Correct Answer
A. ContoursExplanation
Contours are lines that connect points with the same elevation values on a map or a topographic representation. These lines help to visualize the shape and relief of the land, showing the variations in elevation. Contours are commonly used in cartography and are essential for understanding the terrain and planning activities such as hiking, engineering, or land development.Rate this question:
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- 10.
The incline of a surface is called
- A.
Contour
- B.
Hillshade
- C.
Projection
- D.
Slope
Correct Answer
D. SlopeExplanation
The correct answer is "Slope" because slope refers to the steepness or incline of a surface. It is a measure of how much the surface rises or falls over a certain distance. In geography and topography, slope is an important concept used to describe the terrain and is often represented as a percentage or an angle.Rate this question:
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- 11.
The direction of the slope of a surface is called
- A.
Aspect
- B.
Hillshade
- C.
Projection
- D.
Slope
Correct Answer
A. AspectExplanation
The direction of the slope of a surface is referred to as the aspect. Aspect describes the compass direction that a slope is facing, such as north, south, east, or west. It is an important factor in understanding how sunlight and weather patterns may affect the surface.Rate this question:
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- 12.
The appearance of three-dimensional relief created by applying the effect of a light source is called
- A.
Contour
- B.
Hillshade
- C.
Projection
- D.
Slope
Correct Answer
B. HillshadeExplanation
Hillshade refers to the appearance of three-dimensional relief created by applying the effect of a light source. This effect creates shadows and highlights on a surface, giving it a sense of depth and dimension. It is commonly used in cartography and computer graphics to enhance the visual representation of terrain or topography.Rate this question:
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- 13.
In ArcGlobe, the type of layer that is laid over the elevation layer and provides visual enhancement to the display is called a
- A.
Floating layer
- B.
Draped layer
- C.
Elevation layer
- D.
Suspended layer
Correct Answer
B. Draped layerExplanation
A draped layer in ArcGlobe is a type of layer that is laid over the elevation layer and provides visual enhancement to the display. It is used to drape features such as roads, buildings, or vegetation over the terrain surface. This layer helps to create a more realistic and visually appealing representation of the data in ArcGlobe.Rate this question:
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- 14.
In ArcGlobe, the type of layer that provides terrain to the global surface is the
- A.
Floating layer
- B.
Draped layer
- C.
Elevation layer
- D.
Suspended layer
Correct Answer
C. Elevation layerExplanation
The correct answer is Elevation layer. In ArcGlobe, an elevation layer is used to provide terrain to the global surface. This layer contains elevation data, such as digital elevation models (DEMs), which represent the height of the Earth's surface. The elevation layer is essential for creating realistic 3D visualizations in ArcGlobe, as it determines the shape and form of the terrain.Rate this question:
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- 15.
Which of the following 3D Analyst conversion options would be used to convert grid data to a TIN?
- A.
3D Shapefile to TIN
- B.
Create TIN from Features
- C.
Raster to TIN
- D.
TIN to Raster
Correct Answer
C. Raster to TIN -
- 16.
Which of the following 3D Analyst conversion options would be used to convert elevation point data to a TIN?
- A.
3D Shapefile to TIN
- B.
Create TIN from Features
- C.
Raster to TIN
- D.
TIN to Raster
Correct Answer
B. Create TIN from FeaturesExplanation
The correct option to convert elevation point data to a TIN is "Create TIN from Features". This option allows the user to create a TIN (Triangulated Irregular Network) from a set of features, such as elevation points. It analyzes the input features and generates a TIN surface by triangulating the points and creating a network of irregular triangles that represent the terrain. This conversion option is specifically designed for converting point data to a TIN representation.Rate this question:
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- 17.
If you were draping an air photo and feature data layers on a 3D surface in ArcScene, what would you assign as the Base Height?
- A.
Air photo
- B.
Feature data layer
- C.
Nothing
- D.
TIN
Correct Answer
D. TINExplanation
In ArcScene, when draping an air photo and feature data layers on a 3D surface, the Base Height should be assigned as a TIN. A TIN (Triangulated Irregular Network) is a digital representation of a terrain surface, which can be used to drape imagery and data layers onto. By assigning the TIN as the Base Height, the air photo and feature data layers will be draped accurately onto the 3D surface, creating a realistic representation of the terrain.Rate this question:
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- 18.
Which of the following would be the best example of an extrudable shapefile that could be viewed using 3D Analyst?
- A.
Air photo
- B.
Light poles
- C.
Parking lot
- D.
Sidewalk
Correct Answer
B. Light polesExplanation
Light poles would be the best example of an extrudable shapefile that could be viewed using 3D Analyst. Shapefiles are a common geospatial data format that can represent different types of features on a map. In this case, light poles can be represented as points in a shapefile, and using 3D Analyst, these points can be extruded to create a 3D representation of the light poles. This allows for a more realistic visualization of the light poles in a 3D environment.Rate this question:
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- 19.
TINs differ from 3D shapefiles because
- A.
3D shapefiles represent features three-dimensionally and a TIN represents a surface three-dimensionally.
- B.
TINs represent features three-dimensionally and 3D shapefiles represent a surface three-dimensionally.
- C.
3D shapefiles cannot be displayed in ArcScene but TINs can.
- D.
TINs cannot be displayed in ArcScene but 3D shapefiles can.
Correct Answer
A. 3D shapefiles represent features three-dimensionally and a TIN represents a surface three-dimensionally.Explanation
The correct answer states that 3D shapefiles represent features three-dimensionally while a TIN represents a surface three-dimensionally. This means that 3D shapefiles are used to represent individual objects or features in three dimensions, while TINs are used to represent the shape or surface of an area in three dimensions. This highlights the key difference between the two formats and their intended uses in spatial data representation.Rate this question:
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- 20.
2D shapefiles differ from 3D shapefiles because
- A.
2D shapefiles cannot be displayed in ArcScene.
- B.
2D shapefiles cannot be draped on a TIN surface
- C.
3D shapefiles have a Z value (height or elevation) associated with them.
- D.
2D shapefiles have a Z value (height or elevation) associated with them.
Correct Answer
C. 3D shapefiles have a Z value (height or elevation) associated with them.Explanation
2D shapefiles only contain X and Y coordinates, representing the horizontal position of the features. They do not have a Z value associated with them, which represents the height or elevation of the features. On the other hand, 3D shapefiles include a Z value, allowing for the representation of features in three dimensions, including their height or elevation.Rate this question:
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Mar 19, 2023Quiz Edited by
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