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Scroll-based interaction is incredibly popular for interactive storytelling . There are many compelling reasons for this, yet scrolling is surprisingly nuanced and easy to break. So here are five rules for employing scrolling effectively.
My previous Let’s Make a Map tutorial describes how to make a basic map with D3 and TopoJSON ; now it’s time to cover thematic mapping in the form of a proportional symbol map. The simplest symbol is a circle, or bubble , whose area is proportional to the associated data. In this tutorial, we’ll make a bubble map of…