Demers Cartogram

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Demers Cartogram

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Last edited Mar 24, 2016

Created on Mar 24, 2016

This visualization shows a pseudo-Demers cartogram of U.S. adult obesity rates, with each state represented by a square whose area encodes the prevalence of BMI ≥ 30. The squares are initially placed at their geographic centroids and then shifted via a d3.layout.force simulation with custom gravity and collision functions to avoid overlap while preserving approximate locality. The code uses d3.geo.albersUsa() for projection and d3.geom.quadtree for collision detection, rendering as SVG rectangles. Data comes from CDC 2008 values embedded as an array, with state centroids loaded from an external JSON file.

AI-generated description

This is not a true Demers cartogram; it lacks links between adjacent features. Instead of trying to preserve connectedness, this pseudo-cartogram tries to preserve locality, putting each square as close as possible to its origin without overlapping.

forked from <a href='http://bl.ocks.org/mbostock/'>mbostock</a>'s block: <a href='http://bl.ocks.org/mbostock/4055889'>Pseudo-Demers Cartogram</a>

gpl-3.0 Licensed

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