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| Series | Geological Map of Japan 1:200,000 |
| Map sheet number | NI-54-20 |
| Map titl | OTAKI |
| Authors | Takashi MITSUNASHI, Yoshiro SUDA |
| Publication year | 1980 |
| Publisher | Geological Survey of Japan |
| Price | Printed edition:¥1,430 ( Purchase Guide ) |
| Prefectures covered | CHIBA |
| Sheet size | 780mm×530mm |
| Download | Geological Map (Raster, GeoTIFF, KML) To this page |