A prototype data visualization of Sacramento Air Quality Index (AQI) History
It started out as a coding experiment to create an interactive scatter plot/dot plot in Processing. Always on the lookout for good open source data for data visualizations, I came across the EPA site that has archives of air quality values for US cities. I wanted to create an interactive time series dot plot data visualization of ozone levels in Sacramento, so this was a perfect source.
The result is my micro site – the Sacramento AQI History using Processing, Carto DB, and some hand-crafted charts made in Adobe Illustrator.
I remade this using D3.js. See Version 2.0 here.