GST 101 - Module 2 Self-assessment Quiz

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Quizzes Created: 7 | Total Attempts: 2,157

Questions: 10 | Attempts: 244 | Updated: Mar 21, 2023

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Self-assessment quiz for GST 101 - Module 2 - Understanding Geospatial Data Models

Questions and Answers

1.

Vector data has an associated attribute table.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
Vector data always has an associated attribute tables that holds the non-spatial descriptive information about its associated feature.

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2.

A vector line must always start and end with a node and may have any number of vertices between the two nodes.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
Vector lines (and polygons) begin and end at a node. Each point of deflection between the beginning and ending nodes is a vertex.

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3.

A text data type cannot be used for mathematical calculations.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
Only numeric data can be used for mathematical calculations. Date data can be used for date calculations, such as determining how many days are between two dates.

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4.

In an attribute table, a row represents single attribute for a record.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
A row represents a single record. Columns represent attributes.

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5.

An ordinal attribute records both order and magnitude.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
An ordinal attribute records order only.

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6.

A ratio attribute has a natural zero.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
A ratio attribute has a natural zero and measures order and magnitude.

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7.

A discrete object is individually indistinguishable and does not exist between observations.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
Discrete objects have well-defined boundaries and do not exist between observations. Examples of discrete objects are light poles, buildings, political boundaries, and roads.

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8.

A raster cell can only hold a color value.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
A raster cell can hold values other than colors.

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9.

A major deficiency of the Triangulated Irregular Network (TIN) data model is that it does not easily accommodate differing sample density.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
One of the primary benefits of a TIN is that it accommodates differing sampling densities. By accommodating differing sampling densities, it uses storage space more efficiently.

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10.

A raster best represents continuous objects.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
Rasters are great choices when you wish to represent continuous objects. Vectors are best for discrete objects but do poorly at continuous objects.

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GST 101 - Module 2 Self-assessment Quiz

Vector data has an associated attribute table.

A vector line must always start and end with a node and may have any number of vertices between the two nodes.

A text data type cannot be used for mathematical calculations.

In an attribute table, a row represents single attribute for a record.

An ordinal attribute records both order and magnitude.

A ratio attribute has a natural zero.

A discrete object is individually indistinguishable and does not exist between observations.

A raster cell can only hold a color value.

A major deficiency of the Triangulated Irregular Network (TIN) data model is that it does not easily accommodate differing sample density.

A raster best represents continuous objects.