{
  "name": "Calibration card: choropleth map",
  "desc": "The values in the Calibration card at the top of the page, one field per row, with the source of each value.",
  "lic": "CC BY 4.0",
  "lic_url": "https://creativecommons.org/licenses/by/4.0/",
  "by": "The Yardstick Almanac",
  "url": "https://theyardstickalmanac.com/maps/choropleth-map/",
  "from": [
    "U.S. Census Bureau, Vintage 2025 county population estimates and components (CO-EST2025-ALLDATA, released March 2026), public domain",
    "U.S. Census Bureau, 2025 cartographic boundary files, counties and states, 1:20,000,000, public domain"
  ],
  "how": "Compiled by The Yardstick Almanac from the data listed",
  "data_by": [
    "U.S. Census Bureau, Vintage 2025 county population estimates and components (CO-EST2025-ALLDATA, released March 2026), public domain; U.S. Census Bureau, 2025 cartographic boundary files, counties and states, 1:20,000,000, public domain; computed 2026-11-01, CC BY 4.0"
  ]
}