'Igld 1985 heights' presentation slideshows

by David Conner Geodetic Advisor to the State of Ohio National Geodetic Survey, NOAA

by David Conner Geodetic Advisor to the State of Ohio National Geodetic Survey, NOAA Dave.Conner@noaa.gov. International Great Lakes Datum Overview Presented at a Height Modernization Program meeting January 9, 2014. NGS and the NSRS Who are those guys? And what is CO-OPS?.

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