{
  "name": "One minute of latitude on WGS 84, every degree from 0° to 90°",
  "desc": "Ground length of one minute of latitude along a WGS 84 meridian at each whole degree, its difference from 1852 m and that difference as a percent; computed two ways and rounded to 0.01 m.",
  "lic": "CC BY 4.0",
  "lic_url": "https://creativecommons.org/licenses/by/4.0/",
  "by": "The Yardstick Almanac",
  "url": "https://theyardstickalmanac.com/units/nautical-mile/",
  "from": [
    "PROJ 9.8.1, src/ellps.cpp: WGS 84 a = 6378137.0 m, 1/f = 298.257223563 (corresponding to NGA TR8350.2); Clarke 1866 a = 6378206.4 m, b = 6356583.8 m",
    "BIPM, The International System of Units (SI Brochure), 9th edition, V4.01 (June 2026), Table 8 and note (k): 1 nautical mile = 1852 m; 1 knot = (1852/3600) m/s"
  ],
  "how": "Compiled by The Yardstick Almanac from the data listed",
  "data_by": [
    "Computed 2026-11-01 from the WGS 84 constants in PROJ 9.8.1 src/ellps.cpp (MIT license) and the 1852 m definition in the BIPM SI Brochure, 9th ed. V4.01 (CC BY 4.0; adapted: the defined value used in new calculations); CC BY 4.0"
  ]
}