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      Mark Details (GOLA last updated on 20-Apr-2026)
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    BM     MM 14B
    Alternate names : JP 840 Map ref.: MARYVILLE BG35 5.6
    APREF/NGCA codes: Database number : 130435
    Stamp name:      MM14B Date established :   01/05/1978
    Physical status : located (Manfred Surveys) Phys. status date :  18/07/2016
    Physical type :    brass plaqueHatch cover type : unknown
    Mark set in :        concrete blockAccess type : 2 wheel drive
    Geographical CoordinatesMGA2020 Coordinates
    Horizontal datum : GDA2020Zone :             50
    Latitude :     S 31 34 39.75960Easting (m) :   404726.526
    Longitude :  E 115 59 45.37147Northing (m) :  6505933.128
    Convergence :       -0 31 32.96
    Point scale factor : 0.99971195
    Coordinate date :       15/06/2018
    Horizontal method :   GDA94<>GDA2020 7 Para TransformedCadastral connection : No
    Relative horiz. accuracy :       5m ** Estimated relative uncertainty to adjacent marks
    Positional uncertainty (m) : 5 (95% Confidence level)
    Error Ellipse
    Semi-major axis (m) : 5.000
    Semi-minor axis (m) : 5.000
    Azimuth of semi-major axis (deg) : 0 0 0
    ** Projection coordinates are calculated from the geographical coordinates detailed above
    Project Grid - PCG2020Perth Coastal Grid 2020
    Easting (m) :   67016.947
    Northing (m) :  404961.634
    Convergence :       0 5 37.95
    Point scale factor : 1.00000263
    Height Information
    Vertical datum :   AHD71Height type :          Orthometric
    Height (m) :         51.878Height date :          04/05/2000
    Established by :  Dept of Land Admin.State :                    Final
    Vertical method : Spirit LevellingVertical accuracy : 8rootK
    Derived GDA2020 ellipsoidal height (m) : 20.822N-Value (m) :          -31.056
    Geoid model :         AusGeoid2020
    ** Derived GDA2020 ellipsoidal height: h = H + N Interpolation :         Bi-Cubic
    Mark to hatch cover :  
    Mark to ground level : 
    RM Info** Warning: RM azimuths and coordinates are unverified
    ** Azimuth, distance and height difference are relative to main mark
    RM1 Phys. status : destroyed (Landgate) Date :   10/09/2009
    Phys. type :    Set in :
    Azimuth :           0 0 0Type :   
    Distance (m) :    15.170Type :   Horizontal
    Height diff. (m) : -0.283Type :   Spirit Levelling
    RM to GL (m) :   0.000
    RM2 Phys. status : located (Landgate) Date :   10/09/2009
    Phys. type :    Set in :
    Azimuth :           0 0 0Type :   
    Distance (m) :    15.017Type :   Horizontal
    Height diff. (m) : -0.286Type :   Spirit Levelling
    RM to GL (m) :   0.000
    RM3 Phys. status : established (Landgate) Date :   10/09/2009
    Phys. type :    Set in :
    Azimuth :           0 0 0Type :   
    Distance (m) :    15.170Type :   Horizontal
    Height diff. (m) : -0.306Type :   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
    RM1
    Geographical Coordinates:No current GDA2020 coordinates exist
    Height Information
    Vertical datum :   
    Height (m) :         No height available
    RM2
    Geographical Coordinates:No current GDA2020 coordinates exist
    Height Information
    Vertical datum :   
    Height (m) :         No height available
    RM3
    Geographical Coordinates:No current GDA2020 coordinates exist
    Height Information
    Vertical datum :   
    Height (m) :         No height available
    Cadastral Connection Fieldbooks
    No Fieldbooks for this mark
    Special Notes
    No Special Notes for this mark
    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
    BM     MM 14B
    Alternate names : JP 840 Map ref.: MARYVILLE BG35 5.6
    APREF/NGCA codes: Database number : 130435
    Stamp name:      MM14B Date established :   01/05/1978
    Physical status : located (Manfred Surveys) Phys. status date :  18/07/2016
    Physical type :    brass plaqueHatch cover type : unknown
    Mark set in :        concrete blockAccess type : 2 wheel drive
    Geographical CoordinatesMGA94 Coordinates
    Horizontal datum : GDA94Zone :             50
    Latitude :     S 31 34 39.80810Easting (m) :   404725.515
    Longitude :  E 115 59 45.33260Northing (m) :  6505931.625
    Convergence :       -0 31 32.98
    Point scale factor : 0.99971195
    Coordinate date :       25/07/2001
    Horizontal method :   Differential GPSCadastral connection : No
    Relative horiz. accuracy :       5m ** Estimated relative uncertainty to adjacent marks
    Positional uncertainty (m) : 5 (95% Confidence level)
    ** Projection coordinates are calculated from the geographical coordinates detailed above
    Project Grid - PCG94Perth Coastal Grid 1994
    Easting (m) :   67015.919
    Northing (m) :  304960.142
    Convergence :       0 5 37.93
    Point scale factor : 1.00000263
    Height Information
    Vertical datum :   AHD71Height type :          Orthometric
    Height (m) :         51.878Height date :          04/05/2000
    Established by :  Dept of Land Admin.State :                    Final
    Vertical method : Spirit LevellingVertical accuracy : 8rootK
    Derived GDA94 ellipsoidal height (m) : 20.846N-Value (m) :          -31.032
    Geoid model :         AUSGeoid09 V1.01
    ** Derived GDA94 ellipsoidal height: h = H + N Interpolation :         Bi-Cubic
    Mark to hatch cover :  
    Mark to ground level : 
    RM Info** Warning: RM azimuths and coordinates are unverified
    ** Azimuth, distance and height difference are relative to main mark
    RM1 Phys. status : destroyed (Landgate) Date :   10/09/2009
    Phys. type :    Set in :
    Azimuth :           0 0 0Type :   
    Distance (m) :    15.170Type :   Horizontal
    Height diff. (m) : -0.283Type :   Spirit Levelling
    RM to GL (m) :   0.000
    RM2 Phys. status : located (Landgate) Date :   10/09/2009
    Phys. type :    Set in :
    Azimuth :           0 0 0Type :   
    Distance (m) :    15.017Type :   Horizontal
    Height diff. (m) : -0.286Type :   Spirit Levelling
    RM to GL (m) :   0.000
    RM3 Phys. status : established (Landgate) Date :   10/09/2009
    Phys. type :    Set in :
    Azimuth :           0 0 0Type :   
    Distance (m) :    15.170Type :   Horizontal
    Height diff. (m) : -0.306Type :   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
    RM1
    Geographical Coordinates:No current GDA94 coordinates exist
    Height Information
    Vertical datum :   
    Height (m) :         No height available
    RM2
    Geographical Coordinates:No current GDA94 coordinates exist
    Height Information
    Vertical datum :   
    Height (m) :         No height available
    RM3
    Geographical Coordinates:No current GDA94 coordinates exist
    Height Information
    Vertical datum :   
    Height (m) :         No height available
    Cadastral Connection Fieldbooks
    No Fieldbooks for this mark
    Special Notes
    No Special Notes for this mark