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Episode: How to Complete Japan’s Building Mapping in One Year? Strategies for Integrating PLATEAU Data into OSM (sotm2025)
Description: Since 2020, Japan’s Ministry of Land, Infrastructure, Transport and Tourism (MLIT) has led Project PLATEAU, releasing 3D city models in CityGML format. By 2025, over 236 municipalities have published building datasets compatible with the Open Database License (ODbL), suitable for integration into OpenStreetMap (OSM).
Since 2022, OpenStreetMap Japan volunteers have imported PLATEAU’s Level of Detail 1 (LOD1) building data into OSM, completing imports for 13 cities as of May 2025. Despite these efforts, only about 62% of Japan’s estimated 38 million building polygons are mapped in OSM.
This presentation proposes a roadmap to complete Japan’s building mapping within one year, focusing on optimizing PLATEAU data imports...