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      Mark Details (GOLA last updated on 17-Jun-2026)
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    SSM     SOUTH RANKIN
    Alternate names : Map ref.: SOUTHERN CROSS SH50-16
    APREF/NGCA codes: 36WDDatabase number : 100402
    Stamp name:      Date established :   01/01/1958
    Physical status : destroyed (Curtin University)Phys. status date :  16/07/2021
    Physical type :    brass rodHatch cover type : none
    Mark set in :        concreteAccess type : 2 wheel drive
    Geographical CoordinatesMGA2020 Coordinates
    Horizontal datum : GDA2020Zone :             50
    Latitude :     S 31 19 50.31493Easting (m) :   716938.229
    Longitude :  E 119 16 48.14210Northing (m) :  6531508.390
    Convergence :       1 11 9.71
    Point scale factor : 1.00018051
    Coordinate date :       13/08/2018
    Horizontal method :   GNSS Survey NetworkCadastral connection : Exists
    Relative horiz. accuracy :       5ppm ** Estimated relative uncertainty to adjacent marks
    Positional uncertainty (m) : 0.015 (95% Confidence level)
    Error Ellipse
    Semi-major axis (m) : 0.015
    Semi-minor axis (m) : 0.015
    Azimuth of semi-major axis (deg) : 155 33 3
    Height Information
    Vertical datum :   AHD71Height type :          Orthometric
    Height (m) :         466.107Height date :          19/10/2004
    Established by :  Haines SurveysState :                    Final
    Vertical method : Spirit LevellingVertical accuracy : 12rootK
    Derived GDA2020 ellipsoidal height (m) : 442.172N-Value (m) :          -23.935
    Geoid model :         AusGeoid2020
    ** Derived GDA2020 ellipsoidal height: h = H + N Interpolation :         Bi-Cubic
    Vertical datum :   GDA2020Height type :          Ellipsoidal
    Height (m) :         442.172Height date :          15/08/2018
    Established by :  Geoscience AustraliaState :                    Final
    Vertical method : GNSS Survey NetworkVertical accuracy : 0.025m
    Mark to hatch cover :  
    Mark to ground level : -0.3
    RM Info
    No RMs for this mark
    Cadastral Connection Fieldbooks
    G19
    LG 113296
    Special Notes
    Unknown DateA 4 metre diameter rock circle surrounds the mark. Centre drilled brass rod placed in centre of original pipe, Nov 1995. RL now refers to brass rod. Note: Owner of property is JUSTIN STEVENS, ph. 090 491440.
    ATRF 2014
    GDA2020 coordinates are equivalent to ATRF2014@2020.0. ATRF2014 coordinates can be determined by application of the Australian Plate Motion Model. For general and technical information on GDA2020 see http://www.icsm.gov.au/gda2020 and ATRF2014 see http://www.icsm.gov.au/australian-terrestrial-reference-frame.
    View the graphic summary
    SSM     SOUTH RANKIN
    Alternate names : Map ref.: SOUTHERN CROSS SH50-16
    APREF/NGCA codes: 36WDDatabase number : 100402
    Stamp name:      Date established :   01/01/1958
    Physical status : destroyed (Curtin University)Phys. status date :  16/07/2021
    Physical type :    brass rodHatch cover type : none
    Mark set in :        concreteAccess type : 2 wheel drive
    Geographical CoordinatesMGA94 Coordinates
    Horizontal datum : GDA94Zone :             50
    Latitude :     S 31 19 50.36396Easting (m) :   716937.209
    Longitude :  E 119 16 48.10467Northing (m) :  6531506.901
    Convergence :       1 11 9.69
    Point scale factor : 1.00018051
    Coordinate date :       05/05/2000
    Horizontal method :   Global Position SystemCadastral connection : Exists
    Relative horiz. accuracy :       3cm ** Estimated relative uncertainty to adjacent marks
    Positional uncertainty (m) : 0.009 (95% Confidence level)
    Error Ellipse
    Semi-major axis (m) : 0.010
    Semi-minor axis (m) : 0.009
    Azimuth of semi-major axis (deg) : 23 0 0
    Height Information
    Vertical datum :   AHD71Height type :          Orthometric
    Height (m) :         466.107Height date :          19/10/2004
    Established by :  Haines SurveysState :                    Final
    Vertical method : Spirit LevellingVertical accuracy : 12rootK
    Derived GDA94 ellipsoidal height (m) : 442.231N-Value (m) :          -23.876
    Geoid model :         AUSGeoid09 V1.01
    ** Derived GDA94 ellipsoidal height: h = H + N Interpolation :         Bi-Cubic
    Vertical datum :   GDA2020Height type :          Ellipsoidal
    Height (m) :         442.172Height date :          15/08/2018
    Established by :  Geoscience AustraliaState :                    Final
    Vertical method : GNSS Survey NetworkVertical accuracy : 0.025m
    Mark to hatch cover :  
    Mark to ground level : -0.3
    RM Info
    No RMs for this mark
    Cadastral Connection Fieldbooks
    G19
    LG 113296
    Special Notes
    Unknown DateA 4 metre diameter rock circle surrounds the mark. Centre drilled brass rod placed in centre of original pipe, Nov 1995. RL now refers to brass rod. Note: Owner of property is JUSTIN STEVENS, ph. 090 491440.