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N.C. Department of Environment and Natural Resources

NC Department of Environment and Natural Resources
Energy Mineral and Land Resources - Message for NC RTN users! - Geodetic Survey

Energy Mineral and Land Resources

North Carolina Geodetic Survey

North Carolina Geodetic Survey has moved to the Department of Public Safety.

Please note! Our new webpage is located at www.ncgs.state.nc.us or geodeticsurvey.nc.gov. This website will be closed on May 1, 2014

 

New NCGS Webpage and Database coming soon!
RFQ_295-03-2014 Elevation LiDAR and aerial imagery QC Surveys
2014 GPS on Bench Marks Campaign
RFQ #295-02-2014 Results
Blogs »
Message for NC RTN users!
 
Access to the old RTN (referenced to NAD83(NSRS2007) will end on the evening of April 4, 2012. If users have not received a new RTN access information email, contact Bart Alligood at bart.alligood@ncdenr.gov for further directions.
 
The new RTN system will be referenced to the most recent National Geodetic Survey (NGS) adjustment of NAD 83, NAD 83(2011) (http://www.ngs.noaa.gov/web/surveys/NA2011/NA2011_Project.shtml), which is aligned with the recently published multi-year CORS solution (www.ngs.noaa.gov/CORS/coord_info/myear_FAQ.shtml).
 
Although NGS has published the new multi-year CORS solution, they are still in the process of adjusting the passive marks to NAD 83(2011).
 
NGS is producing a new geoid (GEOID12) to be released in early 2012 to be used with NAD 83(2011). For more info on the new geoid, please read National Adjustment of 2011 (NA2011) FAQ #20 (http://www.ngs.noaa.gov/web/surveys/NA2011/NA2011_FAQ.shtml).
 
Until the new geoid is released, we recommend localizing to NAVD 88 bench marks when using NAD 83(2011) ellipsoid heights with the current geoid, GEOID09, because GEOID09 was developed to work with NAD 83(NSRS2007).
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