The above datasets are intended as an extraction of the original published demographics. As such they represent the political situation
of the time and have been subject to great scrutiny from contemporaries then and historians since. Users of the data are highly encouraged to review
the surrounding literature before utilizing the data in derivative products.
The original intention of the dataset was to provide a GIS basemap upon which all interwar demographics could be mapped, analyzed and compared. The 1934 source map thus
matches well with 1931 census results. However the 1921 and 1926 census results reflect slightly different administrative structures.
While I have puzzled over how to match the districts together, in the end I never actually solved these problems (it was just a masters thesis).
If you devise or know of a solution please send it along and I may rethink things or provide a link to your solution. Another idea would be to just
build additional GIS layers for each dataset. I suspect these may be out there but I never found a source with districts other than the 1934 map cited.
The current cleanup and reorganization of this data has been prompted by recent requests from people interested in a GIS basemap of Interwar Poland.
I've always thought that surely someone else in Poland must have created better layers over the years yet I don't think any are publicly available.
If there are better sources being distributed then please drop me a line and I will link folks over to them. Its been close to 20 years since I
have looked into these matters so my apologies if I am missing things.
For the GIS basemaps I am providing them under the Public Domain Dedication and License v1.0.
As such the data is free to utilize, copy, steal - anything you want. However as I did spend many a 1990s evening in the University of Wisconsin
Geography lab hunched over an old digitizing board clicking these polygons into existence, attribution would be most appreciated.