Analyzing the early 19th century's survey points in latitude and longitude of less than 0.02 second and geomagnetic declination through Japan from Tadataka Inoh's magnetic survey azimuth .

Motohiro Tsujimoto

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[J] Online Poster

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS22] History X Earth and Planetary Science

Mon. May 22, 2023 9:00 AM - 10:30 AM Online Poster Zoom Room (2) (Online Poster)

convener:Yasuyuki Kano(Earthquake Research Institute, The University of Tokyo), Kei Yoshimura(Institute of Industrial Science, The University of Tokyo), kiyomi iwahashi(kokugakuin university), Harufumi Tamazawa(Kyoto City University of Arts)

On-site poster schedule(2023/5/21 17:15-18:45)

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9:00 AM - 10:30 AM

[MIS22-P02] Analyzing the early 19th century's survey points in latitude and longitude of less than 0.02 second and geomagnetic declination through Japan from Tadataka Inoh's magnetic survey azimuth .

*Motohiro Tsujimoto¹ (1.none)

Keywords:Tadataka INoh's Santou Houi ki (1800-1816), Atlas Des Erdmagnetismus by Gauss and Weber 1840, simultaneous analysis

Geomagnetic declination line in surrounding area of Japan and western Pacific Ocean in Atlas des erdmagnetismus :Nach den Elementen Der Theorie Entwofen edited by Gauss and Weber in 1840 is basically correct,but acculacy in surrounding area of Japan is low ,because they could not gain survey azimuth data of Japan archipelago including geomagnetic declination in Japan archipelago.
We can correct isogonal declination line in Gauss Weber's Atlas des Erdmagnetismus by geomagnetic declination
by the analysis from from Tadataka Inoh's magnetic survey azimuth ledger Santou Houi Ki 67 volumes (1800-1816) including from Eastern Hokkaido to Yakushima island