Tips for understanding the elevation/location changes to the USA National Spatial Reference System
"Ready Set Modernize" xyht article
and some National Geodetic Survey training items
tags:
NGS, NSRS, ASPRS, NAD 83, NAVD 88, NOAA, NOS, LIDAR, FLOOD, NAVIGATION, INFRASTRUCTURE, TRANSPORTATION, GOID12B, GEOID18, RINEX, GNSS, NATRF 2022, ITRF 2020, GRAV-D, WGS84, ELLIPSOID, ORTHOMETRIC, HEIGHT, EGM08, MSL, XYHT