Survey datum

{
  "id": "MLC-T-MET-009461",
  "term": "Survey datum",
  "field": "Meteorology and atmospheric science",
  "definition": "A reference system used to define the horizontal and vertical positions of points on the Earth's surface. It consists of a set of reference points and a mathematical model of the Earth's shape, forming the basis for mapping and geodetic measurements. In meteorology, a vertical datum like mean sea level is the standard reference for measuring station elevation, which is required to calculate sea level pressure.",
  "url": "https://mlchart.com/terminology/meteorology/survey-datum/"
}