Comparison of Helmert and rigorous orthometric heights over Japan

• 資料種別: 記事
• タイトル: Comparison of Helmert and rigorous orthometric heights over Japan
• 著者・編者: Patroba Achola Odera; Yoichi Fukuda
• 出版事項: 日本 : Springer science+business media
• 出版年月日等: 2015-02-24
• 出版年（W3CDTF）: 2015-02-24
• タイトル（掲載誌）: EPS : Earth, Planets and Space
• 巻号年月日等（掲載誌）: 67(27)
• 掲載巻: 67(27)
• ISSN（掲載誌）: 1880-5981
• ISSN-L（掲載誌）: 1343-8832
• 本文の言語コード: eng
• DOI: 10.1186/s40623-015-0194-2; https://doi.org/10.1186/s40623-015-0194-2
• 国立国会図書館永続的識別子: info:ndljp/pid/9381154; https://dl.ndl.go.jp/pid/9381154
• コレクション（共通）: 障害者向け資料
• コレクション（障害者向け資料：レベル1）: テキストデータ
• コレクション（個別）: 国立国会図書館デジタルコレクション > 電子書籍・電子雑誌 > その他; https://dl.ndl.go.jp/collections/B00035
• 収集根拠: オンライン資料収集制度
• 受理日（W3CDTF）: 2015-06-08T22:01:55+09:00
• 保存日（W3CDTF）: 2015-04-20
• 記録形式（IMT）: application/pdf
• オンライン閲覧公開範囲: 国立国会図書館内限定公開
• デジタル化資料送信: 図書館・個人送信対象外
• 遠隔複写可否（NDL）: 可
• 掲載誌（URI）: https://www.earth-planets-space.com/content/67/February/2015
• 掲載誌（国立国会図書館永続的識別子）: info:ndljp/pid/9227920; https://dl.ndl.go.jp/pid/9227920
• 連携機関・データベース: 国立国会図書館 : 国立国会図書館デジタルコレクション; https://dl.ndl.go.jp

• 要約等: The local vertical datum in Japan is based on the Helmert’s approximation of mean gravity along the plumbline. However, determination of a rigorous orthometric height requires that the integral-mean value of gravity along the plumbline between the geoid and the Earth surface has to be known precisely. An attempt has been made to obtain rigorous orthometric heights at 816 GPS/levelling points distributed over four main islands of Japan (Hokkaido, Honshu, Shikoku and Kyushu) by applying corrections to the Helmert orthometric heights. The corrections to Helmert orthometric heights are evaluated from the differences between the integral-mean gravity and the approximate mean gravity along the plumbline. The corrections to Helmert orthometric heights vary from −30.9 cm to 0.0 cm with a mean value of −0.4 cm and standard deviation of ±1.7 cm. An improved high-resolution gravimetric geoid model covering four main islands of Japan from our previous study is used to compare the consistency of the two height systems to a regionally defined gravimetric geoid model. The standard deviation of the differences between gravimetric and GPS/levelling geoid undulations is ±7.5 cm, when Helmert orthometric heights are used. The standard deviation of the differences between gravimetric and GPS/levelling geoid undulations reduces to ±7.3 cm, when rigorous orthometric heights are used. This indicates that rigorous orthometric heights are more consistent with the gravimetric geoid model than Helmert orthometric heights.
• DOI: 10.1186/s40623-015-0194-2; https://doi.org/10.1186/s40623-015-0194-2
• オンライン閲覧公開範囲: インターネット公開
• 著作権情報: © 2015 Odera and Fukuda; licensee Springer. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited
• 関連情報（URI）: http://hdl.handle.net/2433/212435; http://id.ndl.go.jp/digimeta/9381154; https://dl.ndl.go.jp/pid/9381154
• 連携機関・データベース: 国立情報学研究所 : CiNii Research; https://cir.nii.ac.jp/
• 提供元機関・データベース: 学術機関リポジトリデータベース; https://irdb.nii.ac.jp; 雑誌記事索引データベース; https://ndlsearch.ndl.go.jp; CiNii Articles
• 書誌ID（NDLBibID）: 9381154; http://id.ndl.go.jp/bib/9381154
• NII論文ID: 120005756328