This map shows the numbers of archaeological sites that have currently been recorded for each county. These numbers are not necessarily indicative of the total number of sites but reflect how much work has been done in a county. For example, some counties have been subjects of large scale archaeological surveys funded by grants. Some areas are near universities with archaeology programs and have been surveyed more heavily. Other counties are coal mining locales, and state and federal laws require archaeological surveys before the mining may begin. Information changes as avocational and professional archaeologists continue to record new site information. As a result, our knowledge about Indiana's archaeological past is continually expanding.