[Federal Register Volume 78, Number 153 (Thursday, August 8, 2013)]
[Notices]
[Pages 48421-48422]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2013-19167]


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DEPARTMENT OF COMMERCE

National Oceanic and Atmospheric Administration


Publication of North American Datum of 1983 (2011) Epoch 2010.00, 
North American Datum of 1983 (PA2011) Epoch 2010.00 and North American 
Datum of 1983 (MA2011) Epoch 2010.00

AGENCY: National Geodetic Survey (NGS), National Ocean Service (NOS), 
National Oceanic and Atmospheric Administration (NOAA), Department of 
Commerce.

ACTION: Informational Notice

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SUMMARY: The National Geodetic Survey (NGS) has finalized the 
publication of new realizations of three geodetic references frames 
that have all carried the name of ``the North American Datum of 1983'' 
(or ``NAD 83''). The new realizations are NAD 83 (2011) epoch 2010.00 
[for the North America and Caribbean tectonic plates], NAD 83 (MA11) 
epoch 2010.00 [for the Mariana tectonic plate] and NAD 83 (PA11) epoch 
2010.00 [for the Pacific tectonic plate]. These three realizations 
supersede all previous NAD 83 realizations, including CORS96, NSRS2007, 
PACP00 and MARP00, for all epochs prior to 2010.00 (January 1, 2010).
    This notice complements, but does not replace, the affirmation of 
NAD 83 as the official civilian horizontal datum for the United States 
surveying and mapping activities performed or financed by the Federal 
Government (Federal Register Notice, 54 FR 25318, June 14, 1989).

DATES: Individuals or organizations wishing to submit comments on the 
Publication of the North American Datum of 1983 (2011, MA11, PA11), 
epoch 2010.00, should do so by August 30, 2013.

ADDRESSES: Written comments should be sent to the attention of Neil D. 
Weston, Chief--Spatial Reference System Division, Office of the 
National Geodetic Survey, National Ocean Service, 1315 East West 
Highway, Silver Spring, Maryland 20910, fax 301-713-4324 or via email 
[email protected].

FOR FURTHER INFORMATION CONTACT: Requests for additional information 
should be directed to Neil D. Weston, Chief--Spatial Reference System 
Division, Office of the National Geodetic Survey, National Ocean 
Service, 1315 East West Highway, Silver Spring, Maryland 20910, Phone: 
(301) 713-3191.

SUPPLEMENTARY INFORMATION: 

Abstract

    The National Geodetic Survey (NGS), the federal agency responsible 
for defining, maintaining and providing access to the National Spatial 
Reference System (NSRS), has adopted a new realization for each of the 
three geodetic reference frames which carry the name ``NAD 83''. The 
new NAD 83 realizations (2011, MA11, and PA11, all at epoch 2010.00) 
were derived from a simultaneous reprocessing of Global Navigation 
Satellite System (GNSS) data from the NGS-managed Continuously 
Operating Reference Station (CORS) network and a selected number of 
International GNSS Service (IGS) global tracking stations in August 
2011. To ensure spatial consistency of the NSRS, coordinates for all 
current GNSS-derived control stations (passive marks) were optimally 
aligned with the CORS coordinates in a nationwide adjustment completed 
in June 2012.


[[Page 48422]]


    Dated: July 22, 1013.
Juliana P. Blackwell,
Director, Office of National Geodetic Survey, National Ocean Service, 
National Oceanic and Atmospheric Administration.
[FR Doc. 2013-19167 Filed 8-7-13; 8:45 am]
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