Vertical Datums by Dave Doyle
"Vertical Datums” by Dave Doyle, NGS, Chief Geodetic Surveyor (Retired). This presentation provides an overview of the use of vertical datum in the US and their relationships to each other.
Видео Vertical Datums by Dave Doyle канала Geospatial Users Group
Видео Vertical Datums by Dave Doyle канала Geospatial Users Group
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