A Study of the Geoid in Canada

• Published in: The Canadian Surveyor
• Main Author: Lachapelle, Gérard
• Format: Article in Journal/Newspaper
• Language: English
• Published: Canadian Science Publishing 1974
• Subjects: General Earth and Planetary Sciences; General Engineering; General Environmental Science; Yukon; Canada; Newfoundland
• Online Access: http://dx.doi.org/10.1139/tcs-1974-0062; http://www.nrcresearchpress.com/doi/pdf/10.1139/tcs-1974-0062

An astrogeodetic determination of the geoid in certain parts of Canada was made with data available at the end of 1970. The astrogeodetic leveling method was used. The western and eastern parts of Canada were adjusted independently owing to the lack of data in the Province of Ontario. Five satellite stations located across Canada were chosen as initial points of the astrogeodetic geoid. Comparisons with two other astrogeodetic geoids — U.S. Army Map Service 1967 and University of New Brunswick 1973 — and one geoid obtained from a combination of gravimetric and satellite data— Goddard Space Flight Center 1972 — were made. A relative agreement of about five metres was found in every case for most parts covered by the present astrogeodetic geoid except in Newfoundland and Yukon.