4 pages matching astronomic points in this book
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Academy of Sciences accurate control points adjustment computation astro-geodetic astronomic observations astronomic points Baltic Geodetic Commission Baltic Sea base line measurements Columbus determination Earth's crust ellipsoid error establish the Baltic field base line Finland Finland's Academy Finnish geodesists Finnish Geodetic Institute FINNISH GEODETIC RESEARCH Finnish triangulation geodesy geoid computed geoid in Europe gravimetric method gravity anomaly field gravity observations Greenland Gulf of Bothnia heavy antiroots Helsinki high accuracy invar wires isostatic equilibrium Isostatic Institute isostatic system IUGG Kalaja Kittisvaara Kukkamaki and Honkasalo land uplift latitude leading of Dr light interference method light signal long base line Maupertuis measured arc meridian arc needed observation points oceans Ohio State University precise levellings Prof R. A. Hirvonen relative accuracy Russo-Scandinavian arc measurements sea level standard base lines stellar triangulation thickness of Earth's tisvaara Tornio total solar eclipse triangulation chain triangulation point Vaisala comparator vertical World geodetic system Zero-order point