Halloween logicals

With latitude and longitude coordinates, there are a number of ways to map geographic data using D3.js and Leaflet.

If your data is a hierarchy, a treemap is a good way to show all the values at once and keep the structure in the visual. This is a quick way to make a treemap in R.

Also known as a polar plot, it is usually not the better option over a standard line chart, but in select cases the method can be useful to show cyclical patterns.

Put multiple time series lines on the same plot, and you quickly end up with a mess. Here are practical ways to clean it up.

I almost didn’t make a best-of list this year, but …

These are my picks for the best of 2015. As usual, they could easily appear in a different order on a different day, and there are projects not on the list that were also excellent.

It’s always tough to pick my favorite visualization projects. Nevertheless, I gave it a go.

Due to budget cuts, there is no plan for an updated atlas. So I recreated the original 1870 Atlas using today’s publicly available data.