Fusion of Geodesy and GIS at NOAA's National Geodetic Survey€¦ · NOAA’s National Geodetic...
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geodesy.noaa.gov
Fusion of Geodesy and GIS atNOAA’s National Geodetic Survey
2015 Esri AEC Summit and User Conference
Brian [email protected]
AEC - Sunday July 19, 2015UC- Wednesday, July 22, 2015
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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
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NGS History
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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.
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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
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http://www.ngs.noaa.gov/GPSonBM/
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The NGS Toolbox is composed ofArcGIS Python Script Tools
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bfile
gfile
adj file
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7/13/2014 132014 Esri AEC Summit
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
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latitude E longitude lat interval lon interval rows cols
Esri Grid Header
NGS Grid Header
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7/13/2014 2014 Esri AEC Summit 23
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7/13/2014 242014 Esri AEC Summit
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Horizontal Time Dependent Positioning
HTDP
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