Policy Decisions

Read publications and watch webinars that describe technical decisions about the definition of the new reference frames.

• Blueprint for the Modernized NSRS, Part 1: Geometric Coordinates  (1.2 MB)
  Publication outlines technical and policy decisions about replacing
  NAD 83.
• Watch Webinar discussing Blueprint Part 1 (7/13/2017)
• Blueprint for the Modernized NSRS, Part 2: Geopotential Coordinates  (2.4 MB)
  Publication discusses the planned replacement of all vertical datums of the NSRS.
• Watch Webinar discussing Blueprint Part 2 (2/1/2018)
• Blueprint for the Modernized NSRS, Part 3: Working in the Modernized NSRS  (5.9 MB)
  Publication addresses how geospatial professionals can expect to work within the newly-modernized NSRS when NAD 83 and NAVD 88 are replaced.
• Watch Webinar discussing Blueprint Part 3 (3/11/2021)