GOLA Mark Details screen

	View the graphic summary
BM TIDAL BM 1971
Alternate names :	Map ref.: MANDURAH NW BG33 1.1
APREF/NGCA codes:	Database number : 127672
Stamp name:	Date established : 01/09/1971
Physical status : located (Dept of Land Admin.)	Phys. status date : 05/09/2000
Physical type : brass plaque	Hatch cover type : none
Mark set in : concrete	Access type : 2 wheel drive
Geographical Coordinates	MGA2020 Coordinates
Horizontal datum : GDA2020	Zone : 50
Latitude : S 32 31 43.79100	Easting (m) : 379446.863
Longitude : E 115 42 58.77099	Northing (m) : 6400218.698
	Convergence : -0 41 25.25
	Point scale factor : 0.99977921
Coordinate date : 18/06/2018
Horizontal method : GDA94<>GDA2020 7 Para Transformed	Cadastral 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 (m) : 0 0 0

** Projection coordinates are calculated from the geographical coordinates detailed above
Project Grid - PCG2020	Perth Coastal Grid 2020
	Easting (m) : 40573.258
	Northing (m) : 299503.693
	Convergence : -0 3 14.24
	Point scale factor : 1.00000016

Height Information
Vertical datum : AHD71	Height type : Orthometric
Height (m) : 1.294	Height date : 04/05/2000
Established by : Public Works Department	State : Provisional
Vertical method : Spirit Levelling	Vertical accuracy : 12rootK
Derived GDA2020 ellipsoidal height (m) : -31.301	N-Value (m) : -32.595
	Geoid model : AusGeoid2020
Derived GDA2020 ellipsoidal height: h = H + N**	Interpolation : Bi-Cubic

Mark to hatch cover :
Mark to ground level :

RM Info

No RMs for this mark

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 TIDAL BM 1971
Alternate names :	Map ref.: MANDURAH NW BG33 1.1
APREF/NGCA codes:	Database number : 127672
Stamp name:	Date established : 01/09/1971
Physical status : located (Dept of Land Admin.)	Phys. status date : 05/09/2000
Physical type : brass plaque	Hatch cover type : none
Mark set in : concrete	Access type : 2 wheel drive
Geographical Coordinates	MGA94 Coordinates
Horizontal datum : GDA94	Zone : 50
Latitude : S 32 31 43.83962	Easting (m) : 379445.859
Longitude : E 115 42 58.73182	Northing (m) : 6400217.188
	Convergence : -0 41 25.27
	Point scale factor : 0.99977921
Coordinate date : 14/03/2001
Horizontal method : Differential GPS	Cadastral 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 - PCG94	Perth Coastal Grid 1994
	Easting (m) : 40572.237
	Northing (m) : 199502.195
	Convergence : -0 3 14.26
	Point scale factor : 1.00000016

Height Information
Vertical datum : AHD71	Height type : Orthometric
Height (m) : 1.294	Height date : 04/05/2000
Established by : Public Works Department	State : Provisional
Vertical method : Spirit Levelling	Vertical accuracy : 12rootK
Derived GDA94 ellipsoidal height (m) : -31.246	N-Value (m) : -32.54
	Geoid model : AUSGeoid09 V1.01
Derived GDA94 ellipsoidal height: h = H + N**	Interpolation : Bi-Cubic