As a lead in to the committee meeting scheduled for 1/16 I would encourage anyone interested in the new datums to be sure to list to the NGS Webinar detailing the new State Plane Coordinates presented by Dr. Michael Dennis "Welcome to the Alpha Zone: A Preview of State Plane 2022".

Also try the alpha-web page he developed - ALPHA NCAT that computes the currently preliminary northing and easting values in each new zone which will be of considerable magnitude.  You can also compute the likely change in orthometric heights from NAVD 88 (and the island vertical datums) to the North American-Pacific Geopotential Datum of 2022 by using the NGS utility xGEOID20 -  https://beta.ngs.noaa.gov/GEOID/xGEOID20/index.shtml

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DAVID DOYLE
BASE 9 GEODETIC CONSULTING
Silver Spring MD
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