Ottoman Census Shapefile

Hello, I want to use gis shapefile to draw the map of ottoman census between 1890 and 1920. How can I find shapefiles of ottoman administrative divisions, such as vilayets, sanjaks and kazas? Thanks a lot.

IPUMS International does not include microdata from the Ottoman Empire’s Census, and only offers shapefiles that correspond to our microdata availability. Unfortunately, this means we do not have shapefiles available for these units. I am linking to the page with all year-specific shapefiles available from IPUMS International in case this is generally of interest to you. If you have the microdata or are aware of sources for them, we would be happy to connect and discuss the possibility adding them to the database and working to provide the corresponding geographic data as well.