Blueprint for the Modernized NSRS, Part 3: Working in the Modernized NSRS Blueprint for 2022, Part 3: Working in the Modernized NSRS

Sometime after 2022, the National Spatial Reference System (NSRS) will be modernized. This document addresses how geospatial professionals can expect to work within the newlymodernized NSRS. At the forefront of these NSRS changes, NGS will embrace time-dependency. Two types of coordinates will reflect this. Survey epoch coordinates (SECs) will estimate a mark’s location on the dates when it was surveyed; active coordinates (ACs) will estimate a mark’s location continuously, for example at a Continuously Operating Reference Station (CORS).