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What Geoid do I need to use with the new NAD83(NA2011) adjustment?

It is recommended that you use the new Geoid 2012 Revision A from NGS if you are working in the United States.  The Geoid12A model is intended to transform between NAD 83 (2011/PA11/MA11) and the respective vertical datums for the different regions, including NAVD88, GUVD04, ASVD02, NMVD03, PRVD02 and VIVD09.  For more information visit - http://www.ngs.noaa.gov/GEOID/GEOID12A/

For Leica users you will find the new Geoid12A at the link below:

Geoid12A.zip

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