Mapping COVID-19 cases in Observable with Vega-Lite

Choropleth maps show how data varies across a geographic region, a visualization technique used often to present a wide variety of data, including economic data, election results and, more recently, the prevalence of COVID-19 cases and deaths. I recently created a choropleth map that pulls live county-level COVID-19 case data from the Missouri Department of … Continued

Build a real-time dataviz bot (for free!)

When it’s not busy playing host to cryptocurrency scams, Twitter remains a widely adopted platform for the distribution of bite-sized information. For that reason alone, it’s well-suited to sharing real-time data—especially via charts and graphics.