Layer Estimates:

Layer: Metro Ground Surface Point 1-5 Metre - Vicmap Elevation (EL_GRND_SURFACE_POINT_1TO5M) (ID:0)
Count: 44216
Extent:

XMin: 16083025.6524
YMin: -4647884.5344
XMax: 16223476.8529
YMax: -4499957.4768
Spatial Reference: 102100 (3857)

Layer: Metro Contour 1-5 Metre - Vicmap Elevation (EL_CONTOUR_1TO5M) (ID:1)
Count: 1065266
Extent:

XMin: 16080618.1793
YMin: -4647988.9205
XMax: 16224848.5501
YMax: -4499858.1428
Spatial Reference: 102100 (3857)