LSU Center for GeoInformatics

Updated Realization of NAD83-2011 Coordinates -

Updated Realization of NAD83-2011 Coordinates Please forward this memo to your organization’s GPS field users/managers. The following outlines changes to the reference framework coordinates that may impact field operations.

Several users of C4Gnet.XYZ are unable to log in successfully.

We started getting calls on 4/17/2026 about problems connecting to the RTN via DNS, which is C4GNET.XYZ

The C4Gnet.XYZ DNS is not working for some users, while it is fine for others. This took some digging, but we have narrowed it down to something not working properly with the DNS. We have a 100% effective workaround to this issue if you need it.

Contact [email protected] if you need help with a solution to this issue.

Things that the LSU Center for GeoInformatics thought you would like to know -

Things that the LSU Center for GeoInformatics thought you would like to know As you can see by the status map below C4G CORS are all online and working as expected. C4Gnet.XYZ subscribers have not and will not be affected by the current Federal Government shutdown.

https://www.lsu.edu/blog/2025/08/katrina-lsrc-elevation.php

https://mailchi.mp/f3cf49962eed/new-c4g-web-store

New C4G Web Store We were having intermittent internal problems with our web store, so we decided to move to a shopping cart hosted in the cloud.  We have completed the migration to Shopify and purged the old accounts that never logged into our old web store.

NGS is Updating Coordinates and Velocities
On June 11th, NOAA’s National Geodetic Survey (NGS) will be updating its OPUS products to work in the new International Terrestrial Reference Frame of 2020 (ITRF2020). For more details, follow this link

NGS is Updating NCN Coordinates On June 11th, NOAA’s National Geodetic Survey (NGS) will be updating its OPUS products to work in the new International Terrestrial Reference Frame of 2020 (ITRF2020). Implementation will also result in updated NAD 83 control coordinates for all CORS. The Multi-Year CORS Solution 3 (MYCS3) resul...

The Southern Louisiana Astrogeodetic Survey: Assessing the Performance of GEOID2022 along the Mississippi River -

The Southern Louisiana Astrogeodetic Survey: Assessing the Performance of GEOID2022 along the Mississippi River NGS participated in a 2024 survey to measure geoid slopes with astronomical techniques along the Mississippi River between New Orleans and Baton Rouge. This survey validates GEOID2022 in a region where accurate orthometric heights are critical, yet data is sparse.

Widespread Power Outages! -

Widespread Power Outages! Causes Widespread Power Outages! Widespread power outages in the path of the storm at 8:30 AM 9/12/24; please check our dynamic sensor map at http://c4gnet.xyz/Map/SensorMap.aspx to see the current status of our stations. If you need to work in the hatched area, please make extra checks of your resu...

Widespread power outages in the path of the storm at 8:30 AM 9/12/24; please check our dynamic sensor map at http://c4gnet.xyz/Map/SensorMap.aspx to see the current status of our stations.

If you need to work in the hatched area, please make extra checks of your results to avoid any issues.

So far we lost power at 5 of our stations as of 6 PM after Hurricane Francine made landfall. Check our dynamic sensor map at http://c4gnet.xyz/Map/SensorMap.aspx to see the current status of all of our stations.