Datum

{
  "id": "MLC-T-MET-004867",
  "term": "Datum",
  "field": "Meteorology and atmospheric science",
  "definition": "A reference point, line, or surface from which measurements are taken or to which they are referred. In meteorology, this often relates to a specific elevation or pressure level used as a base for calculating other atmospheric properties. For example, mean sea level serves as a common vertical datum for altitude measurements.",
  "url": "https://mlchart.com/terminology/meteorology/datum/"
}