New Geometric Datum: plans. Modernizing the U.S. National Spatial Reference System. FGCS San Diego, California Monday 11 July 2011. Joe.Evjen@noaa.gov. Source: Zurich-American Insurance Group. Coordination begins with good coordinates . Geodetic control is the foundation
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Modernizing the U.S.National Spatial Reference System
San Diego, California
Monday 11 July 2011
Coordination begins with good coordinates
Geodetic Control is the critical “basemap” layer for GIS applications
Crustal velocitiesPassive networks are aging(instability, accessibility, loss)
( Identically shaped ellipsoids )
modern users abuse map scale
NAD83 and GNSS lat/lon lattices are 0.006 cm apart
Accurate and seamless!!
Optimized for my project!!