What is spatial data ?

What is an interactive web map ?

What are shapefiles ?

GIS (Geographical Information Systems)

• Leaflet is an open-source JavaScript library for creating web-maps
• Available to download on CRAN
• install.packages("leaflet")
• Leaflet for R is a good place to start

Let's look at a quick example, using leaflet to map the Grafton St. Branch

• Census carried out in 2016
• Full set of results released July 2017 (SAPS)
• Access the SAPS dataset and boundary shapefiles here
• Spatially aggregated to Small Area level
• Rich dataset - 804 variables for 18,641 Small Areas

• Group Small Areas based on similar characteristics
• Use the social and economic characteristics of people living in those areas
• Commercial applications of this are valuable
• Profile and find customers
• Targeting customers

• An Open Source Geodemographic Classification of Small Areas in the Republic of Ireland
• National Centre for Geocomputation (NCG) Maynooth University
• SAPS 2011 Data

1. Create set of derived variables from Census data

2. Subject them to Principal Components Analysis (PCA)

3. Identify subset of components to use in k-means

4. Run k-means clustering on your component variables

5. Identify Characteristics of Clusters