Whether you are interested in wetlands or other landscapes, historical geospatial data can be invaluable for understanding past conditions. But where can you get historical data in a format that is easy to use? Fortunately, there are a number of sources, including historic aerial photos, the Bordner Survey, US Geological Survey topographic maps, Public Land Survey records, and more. Join cartographer Howard Veregin to learn more about these sources and their main features.