what is a trigonometric station

Question: what is a trigonometric station
- Keywords:
  trigonometric
Asked by 524bm1926 to Peter, Jonathan, Grace, Doris, David, Ann on 3 Jun 2019.
- Grace Kago answered on 3 Jun 2019:
  
  I think this is a surveying instrument?
- Peter Macharia answered on 3 Jun 2019:
  
  These are fixed surveying stations (with known northings, Eastings and Height), It’s used as a reference point for surveying and to establish other control stations.

Question: what is a trigonometric station