This script was developed to take a column of a CSV and render it as JSON. Because it was meant for U.S. choropleth maps, it makes a few assumptions about the input CSV's structure--specifically that it has at least three columns:
FIPS
contains a five-digit FIPS 6-4 county code for rows with county-level data. For rows with state-level data, a two-digit FIPS 5-2 state code is used by convention but is ignored.