Master Questions

Question 1

What is table relation?

a definite Skull n Cross boner

Answer 1

• Combining two tables next to eachother
• Can be either Join (visually combined) or
• Relation (next to eachother but not visually combined)

Question 2

What are the 4 methods of data classification?

Answer 2

• User Defined
• Natural Breaks
• Quantile
• Equal Interval

Question 3

Explain the user defined method of data classification and tell where it is useful.

Answer 3

Each class has a range specified by the user. 
-Useful when you want classes to reflect specific data

Question 4

Explain the natural breaks method of data classification

Answer 4

Statistical formula finds breaks that are inherent in the data
- The default setting

Question 5

Explain the quantile method of data classification?

Answer 5

Equal number of values in each class

Question 6

Explain the equal interval method of data classification

Answer 6

Interval between classes is the same.

-separated by intervals of the same percentage ex. classes with intervals of 10%.

Question 7

Define Data classification in GIS

Answer 7

The grouping of raw number data into predetermined classes, defined in a way that best reflects the attribute values and allows the user to interpret the data.

Question 8

What are the 3 Levels of ARC GIS?

Answer 8

Arcview - beginner
Arceditor - intermediate
Arcinfo - full load

Question 9

What are the 3 components of ARC GIS?

Answer 9

Arc map - view and make maps
Arc catalog - manage data
Arc toolbox - analysis and data conversions

Question 10

List the 3 things raster data is good for?

Answer 10

Continuous data
Overlays
Sattelite images

Question 11

What are the 2 commonly used projections for resource management?

Answer 11

UTM

Albers Equal Area

Question 12

3 components of data

Answer 12

Temporal
Spatial
Attribute

Question 13

What are the 4 spatial entities?

Answer 13

Points
-single coordinate, (lookout tower, landing, city)
Lines
-String of connected points (Roads, Streams)
Areas
-closed string of coordinates. real (lake, field, stand) imaginary (property lines)
Surfaces
-topographic surface (2.5 dimensions)

Question 14

What does PCS refer to? give an example

How does GIS deal with PCS

Answer 14

Projected Coordinate system
Refers to the Projection version of lat and long, UTM for example

GIS “draws” to a cartesian system but first it converts from the sphere.

Question 15

What 4 things can be distorted in a projection?

Answer 15

Area
Shape
Distance
Direction

Question 16

What are the 2 types of map generalization are particular to digital maps?
Which is more likely in stream mode?

Answer 16

Smoothing
Weeding (More likely in stream mode since stream mode generates a line with many points. Some need to be weeded to speed up the system.)

Question 17

What are 3 GIS outputs?

Answer 17

Screen
Paper
Web

Question 18

What are the 5 major components of ARC GIS

Answer 18

Hardware
Software
Data
People 
Methods

Question 19

What are the 3 steps in scanning?

Answer 19

1 Computer “photocopying” of data to
2 Generate a raster image,
3 Vectorize the data (optional), and georeference it.