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SS23 Coordinates: MGA94 Grid, GRS80 Ellipsoid, GDA94, Zone 55

East(M)	North(M)	Height (Orthometric[1])
526856.084	5250101.111	11.421

SS12 Coordinates: MGA94 Grid, GRS80 Ellipsoid, GDA94, Zone 55

East(M)	North(M)
526733.329	5249995.150

SS17 Coordinates: MGA2020 Grid, GRS80 Ellipsoid, GDA2020, Zone 55

East(M)	North(M)
526787.939	5249942.842

[1] Orthometric height is the computed height above the geoid, calculated by subtracting the ellipsoid-geoid separation from the GPS measured ellipsoidal height.

1a) Check that there are no gross or systematic errors in your observations, using the standard checks with FL and FR.

b. Calculate the bearing of one line in your traverse using the MGA coordinates of the two control points in your survey (eg the bearing from SS12 to SS17).

c. Use your computed internal angles to compute the bearings of all lines in your traverse.

d). Compute the plane (not MGA) coordinates of CP2. Do this by adopting the MGA coordinates of one of your traverse stations (it could be either SS17 or SS12, but use SS12), and using the calculated bearings and the measured (plane) distances for all lines in your traverse

e) compute the linear and angular misclose of the traverse. Express the linear misclose as both a linear distance and a ratio.

f. It is good practice to check the quality of the coordinates of any datum stations here SS12 or SS17. As a check that the SS12 and SS17 coordinates in Appendix A are accurate, compare the measured horizontal distance from SS12 to SS17 to that determined from the coordinates in

Appendix A after considering projection scale issues. Instructions on considering scale are in

Appendix A