The biggest problem in Croatian genealogy is that your family came from one village, and there are ten surnames in the village. Sorting them out takes time, and so one must find the hamlets where one's family came from, usually by surname. Unlike America where people move around for the opportunity, people in Croatia and other parts of the world tend to live in houses for hundreds of years. This allows us to geolocate our recent relatives.

I used two datasets, one from the Croatian Directorate of Geodetic Administration (DGU), and one from Microsoft, trying to help find those building footprints of those houses.

Take some time and zoom around, use sources like FamilySearch, Ancestry, MyHeritage or actaCroatica to help find your ancestral family home.

This is what got me into GIS. I found positions for "Serbo-Croatian Toponymists" or "Serbo-Croatian Geospatial Linguists", and realized I could make some money with my language skills and a hard digital set of skills. It's easy to get into a field when you spent time looking at Austro-Hungarian maps with Polish orthography for Croatian names and figuring it all out.

For a fullscreen version try this:

Croatian Toponymy (Placenames) (arcgis.com)