Where you get your historical maps and plats to overlay on Google Earth
Here you can find how to set up and use Google Earth as your personal Genealogy GIS (Geographic Information System)
In my family history research, historical maps and plats have proven to be invaluable resources. Using Google Earth to store and display these records helps genealogists visualize exactly where their ancestors lived. Additionally, the platform serves as an effective tool for documenting the original source locations of these digital data.
It has helped me... not it can help you!