Question

Coordinates for your occupied point: N: 30.0' E: 20.01 Elev: 68.14' Procedure: 1. Set up the total station over the occupied point. Level the instrument. 2. Measure the height of the instrument (point on the ground to the axis/centerline of scope) and the height of the prism pole (tip of the pole to the centerline of the prism). Measure the instrument height with a folding ruler and read the height of the pole from the scale on the pole. 3. Sight a point to the north through the total station. Set zero to establish your zero azimuth. 4. While the instrument person is sighting north, the rod person takes the prism pole and holds it level and stable on the measured point. 5. The instrument person then turns the total station to the rod person. Aim the instrument at the center of the prism and take a measurement (MSR1 button). Record the resulting azimuth angle (HA), zenith angle (VA), and slope distance (SD). Using the given coordinates for your occupied point and assumed azimuth use the data you gathered to calculate the coordinates (N, E, Elev) for the measured point. Draw a sketch showing the relationship between the occupied instrument point and measured point.

Answer 1

Complete solution is given below.

new measured procedure to calculate co-ordinate o point is shown below by making following assumptions for measured waive using total station. 41.5 = HI s' HP a) Height of instrument 6) Height of prism () Azinmth angle (HA): a) Zenith angle Cra) e) Slope distance (50) 60° oo" 88° 0' on 200 ft Diagramatic vepsentation for elevation 2001 188° d'o" IV s'=HP 4 IN HD instimavit Station B * prism point Ho Horizontal distance

From figure 90° - 88° 88° = 2° 0' O" $ = 90° cose HD SD Cosao HD 2001 HD = 199.878 Also, sind V SD so Sin 2 x 200 6.981 i. Elevation of B = Etevation of A + HI + V - HP 68./4 + 4 + 6.98 - 5 74.12 to find N and E of point B HD 199.878 HA = 60° OO" Latitude = HD X cos (HA) 199,878 x cos con 99.939 ft

Departme HD x sin (HA) 199.878sin 60 173.099 No NA t hat AB 30 + 99.939 1 129.939) E B EA + DEPAB 11 11 20 + 173.099 193.0991 i. Co-ordinates of measured point B is 1229.9391 193. 699 74.122 E love :