New Datums Are Coming in 2022!  Both a new geometric and a new geopotential (vertical) datum will be released in 2022.  The realization of the new datums.

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Presentation transcript:

New Datums Are Coming in 2022!  Both a new geometric and a new geopotential (vertical) datum will be released in  The realization of the new datums will be through GNSS receivers.  NGS will provide the tools to easily transform between the new and old datums.

How will the new datums affect you? The new geometric datum will change latitude, longitude, and ellipsoid height by between 1 and 2 meters. The new vertical (geopotential) datum will change heights on average 50 cm (20''), with a 1-meter (39'') tilt towards the Pacific Northwest.

What’s Next for Geodetic Datums?

New Datums: What to do now  Move to newest realizations. NAD 83(2011) epoch USGG12 (gravimetric geoid) / GEOID12A (hybrid geoid)  Obtain precise ellipsoid heights on NAVD 88 bench marks. (OPUS-DB, contact NGS Geodetic Advisor) Improves hybrid geoid models and provides “hard points” in new vertical datum. Follow new NGS Guidelines when released.  Move from NGVD 29 to NAVD 88. Understand the accuracy of VERTCON in your area.  Move away from passive marks to GNSS. Especially, move away from classical passive control.  Require/provide complete metadata for all mapping contracts. How did they get the positions/heights? Document it!

New Datums: How can you prepare? Watch for upcoming NGS status updates via conferences, reports, webinars. Understand the impact of changing positions and heights for your community, company, or agency. We’re here to help! New Datums Webpage: NGS Info Center: Find a Geodetic Advisor: Geometric Datum Manager: Joe Evjen Geopotential Datum Manager: Dr. Dru Smith

2015 Geospatial Summit  Planning to host from April 13-14, 2015, in the Washington, DC Area  To be held as part of a broader “conference of conferences” with National Society of Professional Surveyors and Management Association for Private Photogrammetric Surveyors (MAPPS)  Follows the successful 2010 Geospatial Summit. More info at the 2015 Geospatial Summit website: