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U.S. and Canada Collaborate on NGS Survey Marks in Canada

Friday October 30, 2020

Over the previous two years, staff from the NGS's Observation and Analysis and System Development divisions have worked with Canadian Geodetic Survey staff to publish positioning information for NGS survey marks located in Canada. This NGS positioning information will be publicly available to Canadians by the end of the calendar year. Passive survey marks that are used by both nations may share the same or similar designations or descriptions but do not share official positions or heights. The positioning information for survey marks in Canada may be noticeably different and not necessarily compatible with the coordinates in the U.S. National Spatial Reference System.

For more information, contact: Timothy Hanson