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Station Report

Geoid velocity added

To correct for the vertical drift between reference frames, the velocity of the geoid height (VN) is now calculated and incorporated into the calculation of the orthometric height. View documentation to learn more.

Site Identification

Name Province NTS map sheet Unique Number Provincial Identifier Network
98U100 Ontario 040I14 98U100 VA2D64

Horizontal Data

Coordinates scaled from map

Latitude Longitude
42° 52' 58.0" 81° 15' 4.0"
Zone Easting (metres) Northing (metres) Scale
17 479493.477 4747828.181 0.99961

Vertical Data (levelling)

Vertical Datum Elevation (m) Order Gravity (mGal) Published Project ID
CGVD2013 (2010.0) 270.719 1st 980327.22 2013 H13ML1311
CGVD28 271.158 1st 980426.62 1999 N27U99

The CGVD2013 height reported in the Vertical Data table is approximate because it is calculated from historical levelling data and not from the combination of GNSS and a geoid model.

Vertical Datum Separation

Datum 1 − Datum 2 Elevation 1 (m) Elevation 2 (m) Elevation Difference (m) Epoch
CGVD28 (lev) − CGVD2013 (lev) 271.158 270.719 0.439 2010.0

Station Marker

Marker Type Inspected in Established by Status Comments
Unknown 1999 Canadian geodetic survey - nrcan Good


Accessible by passenger car or light truck and a walk of less than 50 m.

London london calibration baseline pier n0. 1 (cbn pillar), concrete pillar with steel top plate on southeast side of highway no. 401, 2.8 km southwest of highway no. 402 overpass, 3.8 km northeast of talbot road overpass, 111 m southwest of centre of scotland drive overpass, 36.7 m from centre line of eastbound lane of highway no. 401, 17.8 m northwest of centre of wonderland road (sideroad running parallel to highway no. 401), opposite point on wonderland road 8.8 m northeast of "intersection ahead" sign for eastbound traffic, 2.8 m northwest of fence line, side bolt in southeast side of pillar, 82 cm below top of pillar.

Use of Canadian Geodetic Survey products and data is subject to the Open Government Licence - Canada

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