The last visualization I tried was to really embrace the idea of time in the data. Instead of a map or bar chart or something else, I placed the state abbreviations around two clock faces. I know it sounds weird, but take a look at the final version.
I think this is a fun visualization, and it communicates more precisely the exact average starting times than the previous graphs. The two clocks could be combined to one, but I worry it’s not quite as clear, so I tried using the different colors to differentiate the two hours.
One last option is to add sparklines. Sparklines are small line charts that are typically used in data-rich tables, often at the end of a row or column. The purpose of sparklines is not necessarily to help the reader find specific values but instead to show general patterns and trends. Here, the sparklines show all five years of data, which allows us to omit three columns of numbers, lightening and simplifying the table. This approach lets us show the full time series in the sparklines while just showing the two endpoints in the table cells.
In the previous iteration of this site, I reserved a special page dedicated to collecting Data Visualization Style Guides. I’m republishing that collection here as a blog post with the rekindled hope that readers will add their own or their organization’s guides to the collection.
The original idea was developed at the Responsible Data Forum in New York City on January 11, 2016. It’s simply a list of data visualization style guides provided in no particular order. The idea is to build a collection of guides that layout style, formatting, and perhaps some other basic recommendations. These should not necessarily be documents that describe “best practices” or “dos and don’ts”.
My hope is that this post will serve as a repository for guides from around the world that others can use to develop their own guides and best practices. The list was originally published in January 2016, started small, and has grown to more than 15 documents. But I’m sure there is more, so please send me your suggestions and links using the comment box below, via the Contact form, or on Twitter.