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    SSM     GC 17
    Alternate names : JP 2252 Map ref.: SHARK BAY SG49-8
    APREF/NGCA codes: Database number : 100697
    Stamp name:      GC17 Date established :   01/01/1960
    Physical status : located (Quantum Surveys P/L) Phys. status date :  12/05/2015
    Physical type :    brass rodHatch cover type : none
    Mark set in :        concreteAccess type : 2wd summer / 4wd winter
    Geographical CoordinatesMGA2020 Coordinates
    Horizontal datum : GDA2020Zone :             49
    Latitude :     S 25 06 50.35112Easting (m) :   775454.148
    Longitude :  E 113 43 53.64624Northing (m) :  7219642.395
    Convergence :       1 9 36.24
    Point scale factor : 1.00053711
    MGA2020 Overlap Coordinates
    Zone :             50
    Easting (m) :   170373.290
    Northing (m) :  7218437.409
    Convergence :       -1 23 18.40
    Point scale factor : 1.00094204
    Coordinate date :       13/08/2018
    Horizontal method :   GNSS Survey NetworkCadastral connection : Exists
    Relative horiz. accuracy :       10ppm ** Estimated relative uncertainty to adjacent marks
    Positional uncertainty (m) : 0.015 (95% Confidence level)
    Error Ellipse
    Semi-major axis (m) : 0.016
    Semi-minor axis (m) : 0.015
    Azimuth of semi-major axis (m) : 133 57 42
    ** Projection coordinates are calculated from the geographical coordinates detailed above
    Project Grid - CARN2020Carnarvon Grid 2020
    Easting (m) :   56545.766
    Northing (m) :  271323.224
    Convergence :       0 1 39.16
    Point scale factor : 0.99999849
    Height Information
    Vertical datum :   AHD71Height type :          Orthometric
    Height (m) :         13.619Height date :          03/09/2004
    Established by :  Dept of Land Admin.State :                    Final
    Vertical method : Spirit LevellingVertical accuracy : 12rootK
    Derived GDA2020 ellipsoidal height (m) : -7.486N-Value (m) :          -21.105
    Geoid model :         AusGeoid2020
    ** Derived GDA2020 ellipsoidal height: h = H + N Interpolation :         Bi-Cubic
    Vertical datum :   GDA2020Height type :          Ellipsoidal
    Height (m) :         -7.488Height date :          15/08/2018
    Established by :  Geoscience AustraliaState :                    Final
    Vertical method : GNSS Survey NetworkVertical accuracy : 0.026m
    Mark to hatch cover :  
    Mark to ground level : -0.717
    RM Info** Warning: RM azimuths and coordinates are unverified
    ** Azimuth, distance and height difference are relative to main mark
    RM3 Phys. status : located (Quantum Surveys P/L) Date :   12/05/2015
    Phys. type :    star iron picketSet in : concrete
    Azimuth :           353 15 24Type :   True azimuth
    Distance (m) :    5.925Type :   Horizontal
    Height diff. (m) : -0.756Type :   Spirit Levelling
    RM to GL (m) :   0.000
    RM Position Information** Warning: RM coordinates should be verified prior to use
    ** Coordinates are calculated from reference observations
    ** Coordinate accuracies commensurate with related observations
    RM3
    Geographical CoordinatesMGA2020 Coordinates
    Horizontal datum : GDA2020Zone :             49
    Latitude :     S 25 06 50.15990Easting (m) :   775453.571
    Longitude :  E 113 43 53.62141Northing (m) :  7219648.295
    MGA2020 Overlap Coordinates
    Zone :             50
    Easting (m) :   170372.451
    Northing (m) :  7218443.280
    Project Grid - CARN2020Carnarvon Grid 2020
    Easting (m) :   56545.073
    Northing (m) :  271329.109
    Height Information
    Vertical datum :   AHD71
    Height (m) :         12.863
    Cadastral Connection Fieldbooks
    LG 130408
    Special Notes
    Unknown Date1 minute climb up West side of hill to trig. No beacon found NM 1986. Road may be closed after rain. Bill Kemp September 1993. RL is to top of pipe 0.717m above concrete base. D.Hardman placed a brass rod in concrete,level with top of pipe, date 20.11.1996. RM1 is now GC 17T (October 1996). RM2 is now GC 17T 1 (May 1999). Original beacon (with vanes) reinstalled over ground mark (September 1999).
    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     GC 17
    Alternate names : JP 2252 Map ref.: SHARK BAY SG49-8
    APREF/NGCA codes: Database number : 100697
    Stamp name:      GC17 Date established :   01/01/1960
    Physical status : located (Quantum Surveys P/L) Phys. status date :  12/05/2015
    Physical type :    brass rodHatch cover type : none
    Mark set in :        concreteAccess type : 2wd summer / 4wd winter
    Geographical CoordinatesMGA94 Coordinates
    Horizontal datum : GDA94Zone :             49
    Latitude :     S 25 06 50.39917Easting (m) :   775453.090
    Longitude :  E 113 43 53.60955Northing (m) :  7219640.937
    Convergence :       1 9 36.22
    Point scale factor : 1.00053710
    MGA94 Overlap Coordinates
    Zone :             50
    Easting (m) :   170372.297
    Northing (m) :  7218435.904
    Convergence :       -1 23 18.42
    Point scale factor : 1.00094205
    Coordinate date :       11/11/1994
    Horizontal method :   Global Position SystemCadastral connection : Exists
    Relative horiz. accuracy :       3cm ** Estimated relative uncertainty to adjacent marks
    Positional uncertainty (m) : 0.01 (95% Confidence level)
    Error Ellipse
    Semi-major axis (m) : 0.000
    Semi-minor axis (m) : 0.000
    Azimuth of semi-major axis (m) : 0 0 0
    ** Projection coordinates are calculated from the geographical coordinates detailed above
    Project Grid - CARN94Carnarvon Grid 1994
    Easting (m) :   56544.737
    Northing (m) :  171321.746
    Convergence :       0 1 39.15
    Point scale factor : 0.99999849
    Height Information
    Vertical datum :   AHD71Height type :          Orthometric
    Height (m) :         13.619Height date :          03/09/2004
    Established by :  Dept of Land Admin.State :                    Final
    Vertical method : Spirit LevellingVertical accuracy : 12rootK
    Derived GDA94 ellipsoidal height (m) : -7.415N-Value (m) :          -21.034
    Geoid model :         AUSGeoid09 V1.01
    ** Derived GDA94 ellipsoidal height: h = H + N Interpolation :         Bi-Cubic
    Vertical datum :   GDA2020Height type :          Ellipsoidal
    Height (m) :         -7.488Height date :          15/08/2018
    Established by :  Geoscience AustraliaState :                    Final
    Vertical method : GNSS Survey NetworkVertical accuracy : 0.026m
    Mark to hatch cover :  
    Mark to ground level : -0.717
    RM Info** Warning: RM azimuths and coordinates are unverified
    ** Azimuth, distance and height difference are relative to main mark
    RM3 Phys. status : located (Quantum Surveys P/L) Date :   12/05/2015
    Phys. type :    star iron picketSet in : concrete
    Azimuth :           353 15 24Type :   True azimuth
    Distance (m) :    5.925Type :   Horizontal
    Height diff. (m) : -0.756Type :   Spirit Levelling
    RM to GL (m) :   0.000
    RM Position Information** Warning: RM coordinates should be verified prior to use
    ** Coordinates are calculated from reference observations
    ** Coordinate accuracies commensurate with related observations
    RM3
    Geographical CoordinatesMGA94 Coordinates
    Horizontal datum : GDA94Zone :             49
    Latitude :     S 25 06 50.20795Easting (m) :   775452.513
    Longitude :  E 113 43 53.58472Northing (m) :  7219646.837
    MGA94 Overlap Coordinates
    Zone :             50
    Easting (m) :   170371.458
    Northing (m) :  7218441.775
    Project Grid - CARN94Carnarvon Grid 1994
    Easting (m) :   56544.044
    Northing (m) :  171327.631
    Height Information
    Vertical datum :   AHD71
    Height (m) :         12.863
    Cadastral Connection Fieldbooks
    LG 130408
    Special Notes
    Unknown Date1 minute climb up West side of hill to trig. No beacon found NM 1986. Road may be closed after rain. Bill Kemp September 1993. RL is to top of pipe 0.717m above concrete base. D.Hardman placed a brass rod in concrete,level with top of pipe, date 20.11.1996. RM1 is now GC 17T (October 1996). RM2 is now GC 17T 1 (May 1999). Original beacon (with vanes) reinstalled over ground mark (September 1999).