This webpage from the Geographic Information Technology Training Alliance (GITTA) looks at he process of classifying data in relation to mapping and cartography. It discusses each of the major classification methods and provides examples and a quiz to improve understanding.
Excerpt
"Why can it be useful to classify data before creating a map?
The human eye only has a limited ability to discriminate a large number of different areal symbol shades. Due to this fact, it is sometimes essential to classify quantitative thematic map content. This allows us to create a smaller number of data classes and to choose symbol shades that can be distinguished easily."
Contents
- Classified versus unclassified data
- What is a classified map?
- Why can it be useful to classify data before creating a map?
- What is the difference between a classified and an unclassified map?
- Major Classification Methods
- Discussion of the Classification Methods
Sources
Geographic Information Technology Training Alliance (GITTA) (2011), Classification of Data. Retrieved from:http://www.gitta.info/Statistics/en/html/StandClass_learningObject2.html
'Classification of Data' is referenced in:
Method