Canada The U.S. is replacing NAD83 with NATRF2022: what this means for CanadaMind the gap! A new position referenceReference Frame Modernization in Canada United States U.S. National Spatial Reference System (NSRS) blueprint documents: Part 1: Geometric Coordinates and Terrestrial Reference Frames (2017a)Part 2: Geopotential Coordinates and Geopotential Datum (2017b)Part 3: Working in the Modernized NSRS (2019a)