Kentucky Population Density

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Kentucky Population Density

✓ Published0🌍 Public

Last edited Jun 26, 2016

Created on Jun 26, 2016

This choropleth map shows population density for each county in Kentucky using a ColorBrewer sequential color scale. The visualization uses a threshold scale to map population per square mile into five color classes, with a legend key displayed in the upper-left corner. County boundaries are rendered as white lines, and the state border is drawn in dark gray. Hovering over a county reveals a tooltip with its name and density. The map is projected using Kentucky’s State Plane coordinate system, with data from the U.S. Atlas project. The choropleth uses per-county population and area attributes from a TopoJSON file to compute density, and a ColorBrewer color scheme encodes the values. The visualization was forked from Mike Bostock's block and uses D3 v3 with SVG rendering.

AI-generated description

Created via the U.S. Atlas project as make topo/ky-counties.json, after modifying the Makefile to include population and area statistics. These per-county values are then used to compute the population density of each county.

topojson \
	--id-property=FIPS,STATE_FIPS \
	-p name=COUNTY,name=STATE,+population,area=+SQUARE_MIL \
	-e KY-counties-pop.csv \
	-- shp/ky/counties.shp shp/ky/states.shp

Colors by ColorBrewer.

forked from <a href='http://bl.ocks.org/mbostock/'>mbostock</a>'s block: <a href='http://bl.ocks.org/mbostock/5144735'>Kentucky Population Density</a>

gpl-3.0 Licensed

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