How to look backward and forward through backsight
In Figure 1-19, the instrument would be set up at instrument position one (IP1); a backsight
would be taken on benchmark one (BM1) and a foresight on the turning point (TP).
In the laser rangefinder interface, backsight
and foresight functions were added for enhanced data collection in obstructed situations.
For M/Cingof Receiver Bracket Backsight
On Vmc Bmv45tc30 Bfw Agni Withtwin Pallet Saf No.
Note that when the instrument is set up halfway between the two stations, Figure 5-9, the error between the rod reading and horizontal is the same in the backsight as in the foresight.
In this illustration, the instrument is much closer to the rod for the backsight than for the foresight.
Height of Instrument--The elevation of the line of sight of a surveying instrument, which is obtained by adding the backsight
to the elevation of a known point.
Tenders are invited for Supply of Ic Ramp Backsight
The note keeper must remember that the first backsight and the last foresight are also a pair.
In differential leveling, each station is used as a backsight and a foresight.
is the baseline or the reference line or point that is used as zero angle, as shown in Figure 7-2.
Before stations in an angle and distance topographic survey can be identified, the survey crew must determine what will be used as the backsight
for the angles.