geodesy.noaa.gov

Fusion of Geodesy and GIS atNOAA’s National Geodetic Survey

2015 Esri AEC Summit and User Conference

Brian Shawbrian.shaw@noaa.gov

AEC - Sunday July 19, 2015UC- Wednesday, July 22, 2015

Passive Control(Monuments)

The National Geodetic Survey (NGS) has been around a long time!Our Nation’s first civilian science agency.

NGS and the NSRS continue to evolve!

The National Spatial Reference System continues to evolve with us.

1811Ferdinand Hassler

1807Thomas JeffersonSurvey of the Coast

GPSGNSS

1970NOAA is established

ActiveControl(CORS)

1836U.S. Coast Survey

1878U.S. Coast and Geodetic Survey

NGS History

NGS’ MissionTo define, maintain and provide access to the National Spatial Reference System(NSRS) to meet our Nation’s economic, social, and environmental needs. …………………………………………….........................

The NSRS is a consistent coordinate system that defines latitude, longitude, height, scale, gravity, orientation, and shoreline throughout the United States.

New Datums Are Coming in 2022!§ NOAA’s National Geodetic Survey will

release new geometric (horizontal) and geopotential (vertical) datums in 2022

§ The realization of the new datums will be through GPS/GNSS receivers and will replace the current datums:NAD 83(geometric) and NAVD 88 (geopotential)

§ Target: 2-centimeter accuracy relative to sea level (orthometric heights) using GPS/GNSS and a geoid (gravity) model from NGS’ GRAV-D project.

§ NGS will provide the tools to easily transform between the new and old datums.

MORE INFO:April 13-14 DC Area Geospatial Summit:http://www.geodesy.noaa.gov/2015GeospatialSummit/

New Datums Webpage and Videos:http://www.geodesy.noaa.gov/datums/newdatums/NewDatums.shtml

http://www.ngs.noaa.gov/GPSonBM/

The NGS Toolbox is composed ofArcGIS Python Script Tools

bfile

gfile

adj file

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CONUS

Alaska

Pacific (MA11)

Pacific (PA11)

GIS is only for low spatial accuracy?Median accuracy (95% conf.):0.9 cm horiz, 1.5 cm height

latitude E longitude lat interval lon interval rows cols

Esri Grid Header

NGS Grid Header

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Horizontal Time Dependent Positioning

HTDP

Questions?

NOAA’s National Geodetic Survey

Brian Shawbrian.shaw@noaa.gov2015 Esri AEC Summit and UC