Q2. Using the data from the differential leveling, calculate the elevations of TP 1 and TP 2. (10 Marks) Direction of survey BM 50 Sta, 0000.00 X TP1 Sta TP2 Sta Station Distance BS HIFS Elevation from beginning 5.50 4.20 1.20 1.35 0.00 190.00 3.50 BM 50 07090.50 4.50 4.70 3.30 1.90 0+120.25 1.90 TP2 0-190,20 TOTAL Cheek? Q3. Compute the elevations of all points and calculate the error (if any). (20 Marks) TP2 - 0.000.000 0.010.50 0.100.00 0.150.00 0.1 0-2400 BM 61 Q3. Compute the elevations of all points and calculate the error (if any). (20 Marks) Rod TP 2 TP 1 --000000 0.010.50 0.100.00 0.150.00 0.170.50 0 200.00 05020 OSCH BM 61 Elevation FS = 3.25 120.00 0+190.20 BS = Station 1 dance to BS HI IS FS Elevation FS = 2.45 beginning (m) BS = BM 61 1.55 0.00 0+000.00 *6+120.25 0+010.50 0+100.00 TP1 0+150.00 0+170.50 0+200.00 0+240.50 TP 2 0+250.00 TOTAL Check- Error 1) A backsight (BS) is a rod reading taken at a point of known elevation. 2) A foresight (FS) is a rod reading taken at a point of unknown elevation 3) Digital levels have a digital image processor that uses a charge-coupled device for determining heights and distances 4) The elevation of the line of sight with respect to the assumed sea level is known as the height of the instrument. 5) Differential leveling (DL) employs the surveyor's level. 6) Curvature error occurs for the same reasons that refraction error occurs. 7) Curvature error is the error due to the atmospheric conditions. 8) Curvature error is generally considered to be about one- tenth of the refraction error. 5) Differential leveling (DL) employs the surveyor's level. 6) Curvature error occurs for the same reasons that refraction error occurs. 7) Curvature error is the error due to the atmospheric conditions. 8) Curvature error is generally considered to be about one- tenth of the refraction error. 9) Digital levels cannot be used with regular leveling rods. 10) Differential leveling (DL) employs the surveyor's theodolite