Attribute Tables

Question 1

Attribute Data

Answer 1

Non-spatial information about a geographic feature in a GIS, usually stored in a table and linked to the feature by a unique identifier.

Question 2

Rows

Answer 2

Each one on an attribute table represents a geographic feature.

Question 3

Column

Answer 3

Each one contains information on the attributes of the geographic features.

Question 4

Measurement Levels

Answer 4

A classification that describes the nature of information within the values assigned to variables.

Question 5

Nominal

Answer 5

Non-comparative measurement usually representing a description or a name. (Assigns a phenomenon to a class/group)

Question 6

Ordinal

Answer 6

Ranked data that are comparable only within a given spectrum.

Question 7

Interval

Answer 7

Comparative data with a relatively high degree of accuracy, but with an arbitrary starting point.

Question 8

Ratio

Answer 8

Highest level of data measurement that includes an absolute starting point and allows ratios of values to be produced.

Question 9

Select by attribute

Answer 9

GIS feature that allows the user to select a subset of geographic features by writing an expression.

Question 10

Joining Tables

Answer 10

Adding variable information from one table to the attribute table so it can be mapped.

Question 11

Column-in-Common

Answer 11

In order to join tables, they must each have a field in common with the same values.

Question 12

Cardinality

Answer 12

The numerical relationship between rows of one table and rows of another. It may be one-to-one, one-to-many, many-to-one, or many-to-many.