geodesy noaa gov Federal Geodetic Control Subcommittee Meeting

geodesy. noaa. gov Federal Geodetic Control Subcommittee Meeting August 4, 2016

Agenda Time Topic Welcome, introductions Presenter Dru Smith 1: 15 – 1: 30 NGS Activities Dru Smith 1: 30 – 1: 50 NSRS Modernization Efforts Dru Smith 1: 50 – 2: 10 NAIP Accuracy and GCPs David Davis 2: 10 – 2: 30 OPUS Projects to the IDB Mark Schenewerk 2: 30 – 3: 00 Work Group Updates, Open Discussion, Closing Remarks Work Group Chairs Everyone 1: 00 – 1: 15 Thursday, August 4, 2016 FGCS Meeting 2

FGCS Member Roll Call This subcommittee coordinates geodetic data-related activities among 24 Federal and non-Federal agencies and will report its activities to FGDC. http: //www. fgdc. gov/participation/working-groups-subcommittees/fgcs/directory 3

NGS Geodetic Advisor Program

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Gravity for the Redefinition of the American Vertical Datum (GRAV-D) http: //www. geodesy. noaa. gov/GRAV-D/

Measurements Performed GSVS 11 and GSVS 14: • GPS: 20 identical units, 10/day leapfrog, 40 hours each • Leveling: 1 st order, class II, digital barcode leveling • Gravity: FG-5 and A-10 anchors, 4 L/R in 2 teams • Do. V: ETH Zurich DIADEM GPS & camera system (2011); NGS-trained crew with ETH Zurich CODIA GPS & camera (2014) • LIDAR: Riegl Q 680 i-D, 2 pt/m 2 spacing, 0. 5 km width • Imagery: Applanix 439 RGB Dual. Cam, 5000’ AGL • Other: RTN, short-session GPS, extra gravity marks around Austin, gravity gradients 7

Geoid Slope Validation Survey (GSVS 17) 8

2016 Experimental Geoid 9

Geospatial Summit 2017 April 24 -25, 2017 http: //geodesy. noaa. gov/geospatial-summit/ 10

Work Group Updates and Open Discussion Thursday, August 4, 2016 FGCS Meeting 11