{
  "id": "UN1179",
  "name": "square mile (U.S. survey foot)",
  "ml_name": "ip_mi2_{US}",
  "symbol": "mi2",
  "reference": "https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8#S"
}