The data set is mostly based on 2 maps of Austria from 1835 (Woldan: Floder, Oesterreich, 1835) and 1856 (Woldan: Czoernig, Oesterreich, 1856) available through Sammlung Woldan.
In order to improve geometry accuracy also other available vector data sets were used and adapted, viz.: data provided by
the Mosaic Project, funded by the Austrian Science Fund (FWF) (Project Number: P 21257, http://www.censusmosaic.org/) and
for controlling the borders of Hungary and Transylvania a map from Richard Andree and Albert Scobel (Rumsey: Andree, Scobel, Ungarn und Galizien, 1940) from 1904 was used.
to check the borders from Carinthia and the Austrian Littoral also a map from Andree and Scobel was used (Rumsey: Andree, Scobel, Nieder- und Ober- Österreich, 1905)
the © OpenStreetMap collaborative project (www.openstreetmap.org).
For the border of Kraków a map from the Silesian library in Katowice was used (Eduś - IBR Biblioteki Śląskiej w Katowicach; Jaworzno, 2015).
Anna Piechl was responsible for map vectorization, reviewing existing data, for data consolidation and harmonization, and for data editing based on research by Peter Paul Marckhgott-Sanabria. Peter Paul Marckhgott-Sanabria was responsible for historical investigation and validation, in particular for reviewing the created data sets, for data harmonization and for research on administrative structures in the time period and on the dates of existence of the respective administrative units (time spans between formation and disintegration).
Anna Piechl / Peter Paul Marckhgott-Sanabria, "Austrian Empire 1867", based on Woldan: Floder, Österreich, 1835 and Woldan: Czoernig, Oesterreich, 1856; Census Mosaic: Europe Main, 1900; Eduś - IBR Biblioteki Śląskiej w Katowicach, Jaworzno, 2015 and © OpenStreetMap contributors; published by Histogis