Conclusion
摘要
This study highlights the potential of digitally modeling historical administrative boundaries for historical–geographical research. The REGIS and REThM databases provide a standardized framework for analyzing Europe’s territorial transformations between 1870 and 2020 across multiple spatial scales. By integrating historical census and administrative data, the system enables diachronic and comparative analyses of socioeconomic and demographic change. The approach combines GIS-based generalization and geometry harmonization to ensure analytical consistency.