13 - Attribute data management

Question 1

Steps in attribute management

Answer 1

1. Input
2. Validation
3. Manipulation

Question 2

Manipulation methods

Answer 2

1. Find
2. Select by attributes
3. Add/delete fields
4. Calc geometry
5. Join/ link
6. Create graph
7. Print
8. Export

Question 3

Attribute data types

Answer 3

• short integer (2 bytes)
• long integer (4 bytes)
• float
• double
• text
• date
  AND INCLUDES length and deci places

Question 4

Line graph

Answer 4

Shows changes over time

Question 5

Bar chart / histogram

Answer 5

Shows the frequency/ number of values falling within each class

Question 6

Data type def

Answer 6

how a GIS stores attribute data

Question 7

Single vs double precision floating points

Answer 7

single - 32 bytes (float)
double - 64 bytes (double)

Question 8

Precision vs scale

Answer 8

Precision - the number of digits that can be stored in the field
Scale - the number of
decimal places.
Negative numbers require additional precision to store the negative sign