Historické hranice v prostředí GIS: správní regiony v Česku 1920–2012

This article discusses the methodology of demarcating administrative borders in Czechia in GIS in several chronological horizons and interprets the causes for changes in these borders between 1920 and the present. The current lack of historical administrative borders in the digital form has limited a number of scientific outputs from different disciplines. The result of this work is a database of administrative borders, which covers the territory of Bohemia and a part of Moravia and enables their application in transferring spatial data from historical sources, the creation of reconstruction maps or identification of territories of extensive internal peripheries, especially in the vicinity of regional borders.