Abstract
THE use of different datum planes in Canadian surveys has in the past led to some confusion. The first precise levels run in 1883 were linked to the United States Coast and Geodetic Survey datum level, but since then others have been used. All precise levelling is now under control of the Geodetic Survey of the Department of the Interior, and an order in council dated March 11, 1935, is quoted in the Canadian Surveyor of January. This order decrees that mean sea-level as determined at coastal points by the Canadian Hydrographic Service shall be the official datum line for elevation in Canada, and shall be known as the Canadian Geodetic Datum.
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Canada's Datum Level. Nature 137, 1026 (1936). https://doi.org/10.1038/1371026d0
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DOI: https://doi.org/10.1038/1371026d0