Archives at the Institute for Fisheries Research (IFR) hold records of thousands of lake surveys from the University of Michigan and Michigan Department of Natural Resources. The records contained in this dataset are jpeg images of the index card records from the IFR surveys. Images include the front of the card and when available, the back of a card. and Lake Summary cards include information about the lake location and its characteristics, such as lake depth, water chemistry, water color, and transparency (commonly measured as Secchi depth). There is information on surrounding characteristics such as its connectivity to other waterbodies, shoreline conditions, and surrounding land-use. This card also lists the fishes present in the lake and makes observations about fishing pressure, parasites, and reproduction.
