Ask HN: What are the best resources for learning data visualization techniques?
Really depends on what you want to do, what tools are available to you, and how theoretically you want to get.
For theory based academic papers, take a look through previous IEEE Vis conferences to see what's currently being presented -> http://ieeevis.org/year/2018/welcome
For books on techniques and thinking of it, Nadieh Bremer (D3 and Data Art extraordinaire) has some good reviews -> https://www.visualcinnamon.com/resources/learning-data-visua...
For what's possible using D3 take a look at https://bl.ocks.org/mbostock
For other avenues / tools, feel free to email me at sebastian@dashingd3js.com and I can fill you in. It's what I do for a living (for the past ~6 years) and I've been visualizing data online since about 2008 so I have tons of links and resources to share. Just let me know what's helpful.