To improve the National Spatial Reference System (NSRS) in the United States, the National Oceanic and Atmospheric Administration’s National Geodetic Survey (NGS) is preparing to replace all three current North American Datum of 1983 (NAD83) frames and all current vertical datums, including the North American Vertical Datum of 1988 (NAVD88), with four new terrestrial reference frames and a vertical geopotential datum. More information on Oregon's preparation for these changes can be found on the NSRS Modernization page GEOHub.