Important NevadaGPS moving to NAD83

The default coordinate frame for the NevadaGPS network located in the Reno area will be updated from NAD83/94 HARN to NAD83 (2011) on       April 1, 2020.
This update is necessary to correct up coordinate drift due to station movement over time. The lack of coordinate conversion tools available in OPUS Projects and Trimble Pivot makes it very difficult to output NAD83/94 HARN and add new stations with accurate coordinates.

This update will greatly improve the accuracy of the system and allows for future expansion while working in a common coordinate frame that is still being published by the National Geodetic Survey (NGS).

The new NAD83 (2011) coordinates for the 12 stations that currently make up the NevadaGPS network were processed using OPUS Projects and constraining 10 CORS stations.

The coordinates will be updated after hours on Tuesday March 31st and the system will be operating with the new coordinates starting first thing on Wednesday morning April 1, 2020.

If you have a project tied to any of the NevadaGPS stations please recollect positions on all project control and re-calibrate using your existing project coordinates.

To view these stations on a map and get additional information you can view the following twitter posts:

https://twitter.com/UTSurveyor/status/1236003399813890054
https://twitter.com/UTSurveyor/status/1236005791854780417  

Sean Fernandez, the State of Utah Cadastral Surveyor, will continue to provide updates and information from twitter, so please follow this account and share this information with others.
Have Questions? Please reach out to Sean Fernandez at sfernandez@utah.gov.