Symbol Map

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Last edited Mar 29, 2016

Created on Dec 20, 2012

A symbol map displays the population of each U.S. state as a circle centered on the state’s centroid, with circle area proportional to population via a square-root scale. The visualization overlays these circles on a gray state map rendered with `d3.geo.path`, using TopoJSON for state boundaries and GeoJSON for state centroids. The code loads both datasets with the queue library, sorts states by population, and draws each symbol as an SVG path with a white stroke and semi-transparent steelblue fill.

AI-generated description

The area of each circle in this symbol map is proportional to the population of the associated state.

gpl-3.0 Licensed

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