Choropleth map

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Choropleth map

✓ Published0🌍 Public

Last edited Aug 6, 2018

Created on Aug 6, 2018

This choropleth map displays U.S. county-level unemployment rates as of August 2016, using a threshold scale with a blue sequential color scheme. The map is rendered as SVG with `d3.geoPath` and TopoJSON data from the Census Bureau and the Bureau of Labor Statistics. A legend with a linear axis shows the percentage ranges, and hovering over a county reveals its exact rate via a tooltip. The code also demonstrates preprocessing the raw fixed-width text data into a TSV using command-line utilities like `dsv2dsv`.

AI-generated description

Source: Bureau of Labor Statistics, Census Bureau

This choropleth shows unemployment rates as of August, 2016 with a threshold scale. I employed a mix of command-line tools to transform the fixed-width text file into a CSV, including dsv2dsv:

cat <(echo "id,rate") \
  <(tail -n +7 laucntycur14.txt \
    | grep 'Aug-16' \
    | cut -b 21-22,28-30,129-133 \
    | tr -s ' ' \
    | dsv2dsv -r ' ') \
  | csv2tsv \
  > unemployment.tsv

forked from <a href='http://bl.ocks.org/mbostock/'>mbostock</a>'s block: <a href='http://bl.ocks.org/mbostock/4060606'>Choropleth</a>

gpl-3.0 Licensed

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