Backsight

{
  "id": "MLC-T-MET-000262",
  "term": "Backsight",
  "field": "Meteorology and atmospheric science",
  "definition": "In hydrologic terms, a rod reading taken on a point of known elevation, a benchmark or a turning point. Backsights are added to the known elevation to arrive at the height of the instrument. With a known height of the instrument, the telescope can be used to determine the elevation of other points in the vicinity.",
  "references": [
    "NWS Glossary"
  ],
  "url": "https://mlchart.com/terminology/meteorology/backsight/"
}