For this assignment, we classified the site Monk's Mound, located in Cahokia, Illinois. Cahokia Mounds is the largest prehistoric earthworks north of Mexico and was inhabited from ca. 600-1400 AD. It originally consisted of 120 earthworks, but today is reduced to 80. It is estimated that around 40,000 people may have lived in Cahokia at its peak, yet the reason for it's decline is still unknown. Although there is little known about Cahokia, it is still an important national landmark.
Supervised classification allows you to choose how many classes you use and their general location. I made six classes based off of what I predominantly saw in the Cahokia TIFF image. There is still some slight error in the classification, but I had more control over classification than with unsupervised.
Unsupervised classification automatically classifies areas for you based on the number of classes you desire. This one has eight classes, with almost every single one merging into the class of another (based off toggling back and forth between images). Unsupervised is prone to more error with a fewer number of classes specified.
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