Voronoi diagram

• https://en.wikipedia.org/wiki/Voronoi_diagram

D3

• https://www.jasondavies.com/maps/voronoi
• The state of d3 Voronoi
• Scatterplots in D3 with Voronoi Interaction

Clever usages

• Directly labelling lines
• Mapping gridded data with a Voronoi diagram