Final Exam Flashcards
(33 cards)
What do attribute tables do?
Store data associated with a spatial feature class.
What do standalone tables do?
Store tabular data from any source.
What are some common sources of standalone tables?
Excel, text files, CSV files, and database files are all common sources.
When working with XY (point) data in ArcGIS, what does X represent?
Longitude
When working with XY (point) data in ArcGIS, what does Y represent?
Latitude
When naming fields in Excel for use in ArcGIS, you can only use what characters?
Letters, numbers, and the underscore.
When naming fields in Excel for use in ArcGIS, what does the field name have to start with?
A letter (not a number or an underscore).
What is a Boolean operator?
A logical operator used in a Boolean expression, such as AND, OR, NOT, or XOR.
What is NOT a Boolean operator?
Expressions like “at least”
What does the Boolean AND do?
Specifies a combination of conditions (a AND b = the intersection of those two things)
What does the Boolean OR do?
Specifies a list of alternative conditions (a OR b must be true = everything within those two)
What is select by location designed for?
Spatial data query
What is select by attribute designed for?
Attribute data query
What Boolean operator is used for the intersect tool?
AND
What Boolean operator is used for the union tool?
OR
What is the target layer in select by location queries?
The layer containing the features being selected.
What is the source layer in select by location queries?
The layer containing the features being compared to.
In an attribute table, what are the rows called?
Records.
In an attribute table, what are the columns called?
Fields.
What is the target table in a join?
The table that receives the information.
What is the rule of joining?
Each record in the target table must match one (and only one) record in the joining table. Therefore, only one-to-one and many-to-one joins will work.
What are the three naming rules of creating fields?
The name must be no more than 64 characters long, follow ArcGIS rules (letters, numbers, and underscore), and start with a letter.
In the attribute table what are the rows and columns called?
Records and fields.
What do attribute queries test for?
Table values (such as “population > 400”)