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
Download the us.json file from the second source:
http://bl.ocks.org/mbostock/raw/4090846/us.json
This one works OK for me. (works fine with firefox and safari, but showing nothing with Chrome)
BTW, the us.json file from the first source:
http://bost.ocks.org/mike/bubble-map/us.json
provided me a wrong image same as @anandongithub mentioned above.