Gravity Measurements along the Lines of Precise Levels over Whole Japan by Means of a WORDEN Gravimeter. II. Chûgoku District

Geodesy in Japan

“…H. Nagaoka was sent to Germany by the Geodetic Commission in 1899. The purpose of this mission was the determination of the gravity value at the Tokyo A gravity survey all over Japan except the Hokkaido District was first completed by Tsuboi et al (1953Tsuboi et al ( , 1954aTsuboi et al ( , b, 1955Tsuboi et al ( , 1956a by making use of a Worden gravimeter. All the gravity measurements were carried out along precise levelling routes with an interval of 4000 m. Since it was desirable, however, that gravity stations should be distributed more densely, a nation-wide gravity survey was undertaken once again by the GSI (1955bGSI ( , 1957GSI ( , 1964GSI ( , 1965GSI ( , 1966, measuring gravity values not only at bench marks for levelling but also at triangulation points.…”