Before revision: Terrestrial techniques Triangulation Worldwide BC-4 camera geometric satellite triangulation network In "classical geodesy" (up to the sixties) control networks were established by triangulation using measurements of angles and of some spare distances.
After revision: Measurement techniquesTerrestrial techniques Triangulation Worldwide BC-4 camera geometric satellite triangulation network In "classical geodesy" (up to the sixties) control networks were established by triangulation using measurements of angles and of some spare distances.