[M-GI30] Earth and planetary informatics with huge data management

[MGI30-10] Metadata conversion to a general schema and registration in institutional repositories to make research data more findable

★Invited Papers

*Masahito Nose¹, Atsuki Shinbori², Yoshizumi Miyoshi², Tomoaki Hori², Tsukasa Oohira³, Junko Hashiba³, Chizuko Naoe³, Rui Gakiya³, Maiko Okamoto³, Takeshi Sagara⁴, Takaaki Aoki⁵, Shigeki Matubara⁶, Ichiro Takahashi⁶, Hidekazu Hayashi⁶, Kazunari Yamada⁶, Yoshimasa Tanaka⁷, Shuji Abe⁸, Satoru UeNo⁹, Shun Imajo¹⁰, Yasuo Saito⁷, Takuya Ashikita¹¹, Yuko Hori¹¹, Toshiyuki Shimizu¹¹, Nanako Okamura¹¹, Kaoru Hirano¹¹ (1.School of Data Science, Nagoya City University, 2.Institute for Space-Earth Environmental Research, Nagoya University, 3.Nagoya University Library, 4.Info Proto Co., Ltd., 5.Information Strategy Office, Information and Communications, Nagoya University, 6.Information Technology Center, Information and Communications, Nagoya University, 7.Polar Environment Data Science Center, Research Organization of Information and Systems, 8.International Research Center for Space and Planetary Environmental Science, Kyushu University, 9.Astronomical Observatory, Graduate School of Science, Kyoto University, 10.Data Analysis Center for Geomagnetism and Space Magnetism, Graduate School of Science, Kyoto University, 11.Kyushu University Library)

Metadata is referred to as data that describe data themselves and/or contents of dataset. In the Inter-university Upper atmosphere Global Observation NETwork (IUGONET) project, we have been creating metadata for ground observation data in space physics and registered them in the project’s metadata database since 2009 (http://www.iugonet.org/). The number of metadata registered in the metadata database is now approximately 1200, solely for the dataset. These metadata are based on the IUGONET metadata schema (or data model) version 2.4.0.1, which is an extension of the Space Physics Archive Search and Extract (SPASE) metadata schema version 2.4.0.
The IUGONET metadata database is very useful to researchers in searching for data that they need and obtaining detailed information about the data, although the metadata search is available only through the IUGONET web page or NASA Heliophysics Data Portal. To promote data usage in a wider research community or the general public, it is needed to convert the metadata from the SPASE schema to a more general one so that the metadata can be ingested into other metadata databases. For that purpose, we have developed a mapping table from SPASE to the JPCOAR (Japan Consortium for Open Access Repository) schema, which has been widely used for scholarly communication and data publication in Japan. Using the mapping table, we converted 284 metadata files, which describe data created in Nagoya University, to those in the JPCOAR schema. The converted metadata were registered in the institutional repository of Nagoya University (https://nagoya.repo.nii.ac.jp/). These metadata are consequently harvested by Institutional Repositories DataBase (https://irdb.nii.ac.jp/), Data Catalog Cross-Search System (https://search.ckan.jp/), Google Dataset Search (https://datasetsearch.research.google.com/), and other metadata repositories. The same practice is currently undertaken for the IUGONET metadata managed by Kyushu University. These activities will significantly enhance findability and accessibility of the IUGONET metadata and the research data that they describe.