CLSA - NGS Transition to New State Plane Coordinate System
Welcome
The National Geodetic Survey (NGS), in conjunction with its efforts to modernize the historic horizontal and vertical datums (NAD83 & NAVD88) into new Terrestrial Reference Frames (TRF), has released draft policy and procedures for its planed update to the State Plane Coordinate System of 2022 (SPCS2022) (link: https://www.ngs.noaa.gov/SPCS/draft-policy.shtml ).
NGS is seeking input from stakeholders on these policy and procedures and CLSA requests your input in order to provide NGS CLSA’s input on the proposed policy and procedures. Please take this short survey to help us develop CLSA’s input in the process.
Please note this current input is on the process and not the final design of the SPCS2022 for California.
A few highlights of what we know so far:
The default if no input is received, or conflicting input from different stakeholders is received, for the SPCS2022 will be to have State Plane Coordinate System zones very similar to the historic SPCS83 (CCS83 in California) with the exception that they will be defined by a single parallel rather than two, and minor changes will be made to minimize the overall scale distortion considering terrain and population (+/-50ppm distortion at ground level design criteria).
NGS will not develop what is termed Low Distortion Projections (+/- 20ppm distortion at ground level) for a State, but may adopt some if a State develops them on their own.
There will be an option to have what is called “layered zones” which means that a single statewide zone could be added to the current six zones in California.
There could also be an option for what is termed “special purpose zones” under certain circumstances.
NGS recorded webinars on the SPCS2022 updates can be found here: https://www.ngs.noaa.gov/web/science_edu/webinar_series/2018-webinars.shtml
This initial input is only on the policy and procedures. Should there be consensus among all of the stakeholders in California that we would like something different than the default proposed changes, those requests and proposals will have to be in to NGS by 12-31-2019.
We have also included 1 question requesting input for possible changes to the California State Plane Coordinate System enabling language found in the Public Resources Code (PRC) Sections 8801-8902 in anticipation of updating the PRC to enable SPCS2022.
Thank you for taking the time to consider the future of the State Plane Coordinate System in California.