 | Questions". Geoproject Solutions. Archived from the original on 2016-08-15. "日本測地系2011（JGD2011）とは？ - 空間情報クラブ". club.informatix.co.jp. 2015-08-20. Archived from... 29 KB (3,073 words) - 16:06, 31 December 2023 |
| Questions". Geoproject Solutions. Archived from the original on 2016-08-15. "日本測地系2011（JGD2011）とは？ - 空間情報クラブ". club.informatix.co.jp. 2015-08-20. Archived from... 29 KB (3,073 words) - 16:06, 31 December 2023 |