Back to All Events

CLSA Webinar: The End of Coordinates and Elevations As We Know It

  • Internet GotoWebinar (map)

The End of Coordinates and Elevations As We Know It – Modernization of the North American Datum and the Public Resources Code

On schedule for a 2022 release, NGS plans to replace NAD83 and NAVD88 with a geocentric National Spatial Reference System that as yet leaves many key definitions uncertain. With one-and-a-half meters of horizontal shift and negative three-quarters of a meter orthometric height change, the proposal is not trivial. In preparation for this change, and to clean up some confusion with parts of the existing Public Resources Code, CLSA and CSRC have prepared proposed language to revise the sections on the California Coordinate System and California Geodetic Coordinates and Heights. The proposal was prepared in coordination with a committee of NGS and NSPS preparing a similar model legislation template. 
This session will present what is known of the proposed modernization of the National Spatial Reference System, and perhaps even more interesting, what is yet unknown. A summary of the proposed changes to the California Public Resources Code will be presented with some practical examples of how it could be applied on projects. 

Presenter: Gregory A. Helmer, PLS
Mr. Helmer is a Professional Land Surveyor with over thirty-five years of experience in geodetic control, Surveying Geomatics and GIS. As a Team Leader of geospatial services for Psomas, he is responsible for managing and directing surveying and mapping projects supporting more than a billion dollars in public infrastructure projects. Mr. Helmer has published dozens of articles and papers and is nationally recognized for his contributions to GNSS surveying and high-precision geodesy. Mr. Helmer is a graduate of Chapman University, a contributing author to the National Height Modernization Program for NOAA, a Fellow in the Institute for the Advancement of Engineering, a Fellow with the American Association for Geodetic Surveying, and a founding member and past Chairperson of the California Spatial Reference Center.

Earlier Event: September 13
OC-CLSA Board Meeting