Release of Digitized Historic Maps from the 2025 IRC Project
2026年 05月18日
We are pleased to announce the public release of newly digitized historic map data, produced as part of the 2025 IRC Project. The datasets are now freely available for viewing and download.
1938 Map — Digitization (Polygonization) of 38 Sheets
A total of 38 sheets from the 1938 map have been digitized through polygonization, allowing detailed spatial analysis of the historical landscape.
- View the map: ArcGIS Web App Viewer
- Download the files: Dropbox
1900s Map (Scale 1:1000) — Digitization of 58 Sheets
A total of 58 sheets from the 1900s map series, drawn at a scale of 1:1000, have also been digitized and made available.
- View the map: ArcGIS Web App Viewer
- Download the files: Dropbox
Terms of Use
For information regarding the use of these datasets, including copyright, licensing, and citation requirements, please refer to our Copyright & License / Citation page. Users are kindly requested to review these guidelines before downloading or reusing the data.
We hope these resources will support researchers, educators, and the wider public interested in historical geography and spatial analysis. For inquiries regarding the dataset or its use, please contact the project team.