{"created":"2021-03-01T06:43:12.874380+00:00","id":25269,"links":{},"metadata":{"_buckets":{"deposit":"f0f9eb5d-1d1d-46fe-9265-7b0544677703"},"_deposit":{"id":"25269","owners":[],"pid":{"revision_id":0,"type":"depid","value":"25269"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00025269","sets":["27:2466:2467:2501","9:504:2469:2502"]},"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"東京大学北海道演習林におけるGPS測位精度の季節変動"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2009","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"28","bibliographicPageStart":"19","bibliographicVolumeNumber":"120","bibliographic_titles":[{"bibliographic_title":"東京大学農学部演習林報告"}]}]},"item_4_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"In-depth forest ground surveys are indispensable for experiments on the stand-based forest management system at the Tokyo University Forest in Hokkaido. The Global Positioning System (GPS) offers an innovative surveying technology with high accuracy and labor economy. This study compared the positioning accuracy of handy GPS receivers in summer and winter to obtain practical suggestions for the use of GPS in ground-based forest surveys. In July and December 2007, field tests measured the positions of ten points under the forest canopy with two GPS receivers (MobileMapper Pro and GPSMAP 60CSx). Three-way ANOVA was employed to identify factors that affected positioning accuracy. Results indicated that the season was a significant factor for the GPS measurements. Relatively few GPS positional errors were observed during winter. The presence of foliage probably negatively affected positioning accuracy. Among the receiver settings tested, the MobileMapper Pro receiver with a 30 sec. observation time seemed to be a reasonable choice. Despite the severe terrain on which our measurement points were located, both GPS receivers had good satellite signal reception. We concluded that both the MobileMapper Pro and the GPSMAP 60CSx were suitable receivers for GPS survey applications in most areas of the University Forest.","subitem_description_type":"Abstract"},{"subitem_description":"東京大学北海道演習林における林分施業法の実験では，詳細な現地森林測量が不可欠となっている。全地球測位システム（GPS）は高精度化と省力化とを可能にする革新的な測量技術である。森林測量にGPSを利用する際の実践的な示唆を得るため，本研究では夏季と冬季における携帯型GPS受信機の測位精度について比較を行った。2007 年7 月と12 月に林冠下の10 測点を2 機種のGPS 受信機（MobileMapper Pro およびGPSMAP 60CSx）で測位した。GPS の測位精度に影響を及ぼす要因を明らかにするため，三元配置の分散分析を行った。分析の結果，季節が有意となり，測位誤差は冬季においてより小さくなった。林冠の落葉によって測位精度が改善されたためと推察される。本研究で試験を行った測位方法のなかでは，MobileMapper Pro で1 測点につき30 秒間測位する方法が適当と考えられた。地形的に測位が困難な条件下ではあったが，衛星からの電波は問題なく受信できたことから，両機種とも同演習林内のほとんどの場所で利用が可能と思われる。","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"53651","nameIdentifierScheme":"WEKO"}],"names":[{"name":"尾張, 敏章"}]},{"nameIdentifiers":[{"nameIdentifier":"53652","nameIdentifierScheme":"WEKO"}],"names":[{"name":"笠原, 久臣"}]},{"nameIdentifiers":[{"nameIdentifier":"53653","nameIdentifierScheme":"WEKO"}],"names":[{"name":"及川, 希"}]},{"nameIdentifiers":[{"nameIdentifier":"53654","nameIdentifierScheme":"WEKO"}],"names":[{"name":"福岡, 哲"}]}]},"item_4_publisher_20":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東京大学大学院農学生命科学研究科附属演習林"}]},"item_4_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00162451","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_8":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"03716007","subitem_source_identifier_type":"ISSN"}]},"item_4_subject_15":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"610","subitem_subject_scheme":"NDC"}]},"item_4_text_21":{"attribute_name":"出版者別名","attribute_value_mlt":[{"subitem_text_value":"The Tokyo University Forests"}]},"item_4_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"University Forest in Hokkaido, Graduate School of Agricultural and Life Sciences, The University of Tokyo"},{"subitem_text_value":"東京大学大学院農学生命科学研究科附属北海道演習林"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"OWARI, Toshiaki"}],"nameIdentifiers":[{"nameIdentifier":"53647","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"KASAHARA, Hisatomi"}],"nameIdentifiers":[{"nameIdentifier":"53648","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"OIKAWA, Nozomi"}],"nameIdentifiers":[{"nameIdentifier":"53649","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"FUKUOKA, Satoshi"}],"nameIdentifiers":[{"nameIdentifier":"53650","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-06-09"}],"displaytype":"detail","filename":"ersh120003.pdf","filesize":[{"value":"362.5 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"ersh120003.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/25269/files/ersh120003.pdf"},"version_id":"86ea8df1-b33c-4979-86df-5ea78edcc4bc"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Canopy openness","subitem_subject_scheme":"Other"},{"subitem_subject":"Defoliation","subitem_subject_scheme":"Other"},{"subitem_subject":"Forest survey","subitem_subject_scheme":"Other"},{"subitem_subject":"Handy GPS receiver","subitem_subject_scheme":"Other"},{"subitem_subject":"Positioning accuracy","subitem_subject_scheme":"Other"},{"subitem_subject":"開空率","subitem_subject_scheme":"Other"},{"subitem_subject":"落葉","subitem_subject_scheme":"Other"},{"subitem_subject":"森林測量","subitem_subject_scheme":"Other"},{"subitem_subject":"携帯型GPS受信機","subitem_subject_scheme":"Other"},{"subitem_subject":"測位精度","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Seasonal variation of global positioning system (GPS) accuracy within the Tokyo University Forest in Hokkaido","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Seasonal variation of global positioning system (GPS) accuracy within the Tokyo University Forest in Hokkaido"}]},"item_type_id":"4","owner":"1","path":["2502","2501"],"pubdate":{"attribute_name":"公開日","attribute_value":"2012-07-17"},"publish_date":"2012-07-17","publish_status":"0","recid":"25269","relation_version_is_last":true,"title":["Seasonal variation of global positioning system (GPS) accuracy within the Tokyo University Forest in Hokkaido"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-19T04:03:34.780938+00:00"}