Dataset of Historical County Boundary Maps in California

The dataset comprises historical county boundary map data of California. It serves as a valuable resource for individuals seeking records of past events, including those who aim to analyze, interpret, and display historical data based on counties (such as election and census results), as well as for those engaged in national and local historical projects. The special interests of these potential users span a wide range of fields, including history, demography, economics, genealogy, geography, law, and politics.