A measurement taken with a level or total station looking forward along the line of survey. In leveling, it is the rod reading taken on a point of unknown elevation to establish its height. In traversing, it is the angle and distance measured to the next station to extend the survey network. It always follows a backsight, which establishes the instrument's current reference baseline.
Heard on the job
Take a foresight on that hub by the fence so we can move the instrument up.
Also heard as
- FS
Do not mix it up with
- Backsight: A backsight looks back at a known point to orient the instrument, while a foresight looks ahead to establish a new point.