slides_G_i.md

Geographic Data Science

The need to group data [Dani Arribas-Bel](http://darribas.org)

The need to group data

*Everything should be made as simple as possible, but not simpler*

Albert Einstein

The need to group data

• The world is complex and multidimensional
• Univariate analysis focuses on only one dimension
• Sometimes, world issues are best understood as multivariate. E.g.

* Percentage of foreign-born Vs. *What is a neighborhood?* * Years of schooling Vs. *Human development* * Monthly income Vs. *Deprivation*

Grouping as simplifying

• Define a given number of categories based on many characteristics (multi-dimensional)
• Find the category where each observation fits best
• Reduce complexity, keep all the relevant information
• Produce easier-to-understand outputs

Types of grouping

• Non-spatial clustering
• Regionalisation

A course on Geographic Data Science by Dani Arribas-Bel is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.