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Wisconsin Society of Land Surveyors

Providing Support and Professional Development for Land Surveyors since 1952

Event details

Vertical Datums: An Overview & Planned Updates

  • 15 Jul 2021
  • 2:00 PM
  • Vrtual

Vertical Datums: An Overview & Planned Updates

July 15, 2021  |  2:00-3:00 pm, ET

Presenters: Jacob Heck, Laura Rear McLaughlin, Terese Herron, Michael Michalski

Vertical datums provide reference for determining elevations. In the next few years, NGS, CO-OPS, and partner agencies in Canada, are updating three vertical datums: 

  • the North American Vertical Datum of 1988 (NAVD 88), 
  • the geodetic vertical datum that will be replaced by the North American-Pacific Geopotential Datum of 2022 (NAPGD2022); 
  • the International Great Lakes Datum (IGLD) used to reference water levels in the Great Lakes and connecting channels; and 
  • the National Tidal Datum Epoch (NTDE) used to reference water levels along the U.S. Ocean Coastline.

This webinar gives an overview of these datums and the changes that are coming.

*Technical Content Rating: Beginner - No prior knowledge of this topic is necessary

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