Intro to ArcGIS

Question 1

WHat are two types of data in GIS?

Answer 1

spatial –info that has location

non-spatial –descriptive info that does not have location-based qualities

Question 2

What is an Attribute Table?

Answer 2

a spreadsheet-style form where the rows consist of individual objects and the columns are the attributes associated with the objects

Question 3

What do you call the rows of an attribute table?

Answer 3

Records

Question 4

What do you call the columns of an attribute table?

Answer 4

Fields

Question 5

What are “Attributes”?

Answer 5

Non-spatial data that can be associated with a geospatial location

Question 6

What are 4 types of GIS attribute Data in ArcGIS?

Answer 6

a) Nominal Data
b) Ordinal Data
c) Interval Data
d) Ratio Data

NOMming ORDers IN RAin

Question 7

What is Nominal Data type of data?

Answer 7

• unique identifier of some kind
• if numerical, the differences between numbers are not significant (e.g., a phone number, bank account number, SIN #, etc.)

Question 8

What is Ordinal Data type of data?

Answer 8

• refers to some sort of rankng

given eg. susceptibility to slope failure

Question 9

What is Interval type of data?

Answer 9

A type of numerical data in which the difference between numbers is significant, but there is no fixed non-arbitrary zero point associated with the data (e.g., temperature {in °C}, which can range from negative value to zero to positive value)

Question 10

What is Ratio type of Data?

Answer 10

A type of numerical data in which the difference between numbers is significant, but there exists a fixed non-arbitrary zero point associated with the data (e.g., temperature {in °K}, where –273°C = 0 K)

Question 11

What is the difference between Interval and Ratio Data?

Answer 11

With Interval there is “no fixed non-arbitrary zero point associated with the data” but there is with Ratio data

Question 12

What are two types of joins?

Answer 12

• One-to-one join –When a single record is linked to another single record during a join
• Many-to-one join –When many records in an attribute table can have one other record from another table matched to them during a join

Question 13

What is Relate?

Answer 13

Relate –A type of join that establishes a connection between tables but does not append fields from one table to another table

Question 14

What is Selection?

Answer 14

Selection –When certain records or features are chosen and set aside from the remainder of the records or features

• uses simple query or compound query

Question 15

What is simple vs compound query?

Answer 15

Simple query: contains only one operator

Compound contains more than one operator

Question 16

What is the Boolean operator (query)?

Answer 16

One of the connectors used in building a compound query (i.e., “AND”, “OR” or “NOT”)

Question 17

What is a Hyperlink?

Answer 17

A function that allows the user to connect non-spatial media (e.g., documents, files, photos, URLs, or scripts to a geospatial feature and interactively trigger them

Question 18

What is a Geotag?

Answer 18

(Related to Hyerlink) A provess where non-spatial media is linked to geospatial features