Home

Introduction

• What is a choropleth? When should I use one?
• Level of detail: Creating State, County and ZIP maps

Advanced

• Continuous, Discrete and Manual Scales
• Why ZIP level maps are different
• Mapping Census Data

In the news

• Glenn, Ezra Haber. New choropleth package in R: R mapping innovation drives on. O'Reilly Programming Blog. January 28, 2014.
• Smith, David. Easy data maps with R: the choroplethr package. Revolution Analytics Blog. January 21, 2014.

Datasets

• List of data sources at the state, county and zip / zcta level. StackExchange Open Data. Asked March 9, 2014.

Contact

choroplethr has a google group which is a great place to ask questions or share any interesting choropleths which you have made. I am also always interested in learning about new data sources which would benefit from being visualized with a choropleth.