7. a) Draw the included angles and determine the angle CPD from the given magnetic bearings: PC, N 74° 35' E, PD, S 69° 15’ E. b) Convert the following bearing to azimuth (reckoned from south): N 48° 25’ W. Draw the angle.

What is the bearing from Instrument A (Instru. A) to the Light post (Point D)? 110°20'35" 1000 E 5000 N Instru. A 335° 30' 45" 145° 30' 45" 65° 30' 45" O225°30' 45" 65°20'25" 1247.114 E 4751.420 N Light post Instru. B N

A- The magnetic bearing of the link BA is N 46° 20' E and the magnetic declination in that region at time of surveying was 12° 5' W. The internal angles of the polygon corners A, B, C, D and E are 206° 11',107° 16', 96° 12', 64° 14'and 64° 2', respectively, which was named counterclockwise. Make required checks. Find the true bearing of the lines of the polygon.

Convert a forward bearing of N 89°-42'-01" W to its equivalent forward azimuth 270°-17¹-59" 270°-18¹-59" 269⁰-17¹-59" 269°-42¹-59"

Convert the following bearings to azimuth from north. a) N 27'50'05" E b) S 38 12'44" E c) S 23 16'22" W d) N 73 14'30" W Then, compute the (interior) angle, smaller than 180° between the successive azimuths.

If the bearing from point A to point E is S 00° E, in what quadrant is the bearing from point A to point B? B A 68.42' E 101°28′ 118°34' Quadrant 1 Quadrant 3 78-32-00 Quadrant 2 115.89' 164.95' -Z→ 113°05' D 102°11' 121.69' 88.41' 104°42' C

C. Leveling Rod L₁ FS Leveling Rod - BS BM, HI, TP₁ Elev. of TP, Leveling Rod Horizontal Line of Sight BS + Difference in Elev. between BM and BM₂ Elev of BM, (known) (Do not copy the illustration or drawing) Table: Determination of Elevation STATION BS HI FS ELEVATION BM1 1.60 m 100 m TP1 1.47m 0.85 TP2 1.67 m 0.78 TP3 1.54 m 0.89 BM2 0.75 COMPUTATIONS: 1. Computing Height of Instrument and Elevation. In differential leveling, the following two (2) equations are repeatedly used a.) HI Elev + BS b.) Elev=HI-FS Where: HI = height of instrument above a reference datum (MSL) BS = backsight reading on the rod (or plus sights) FS = foresight reading on the rod (or minus sights) ELEV elevation above datum of a point sighted FS BM₂ Elev. of BM₂