Accounting for wetland loss after European settlement is diffucult due to the dreastic changes in land and water managememt. This research explores utilizing terrain attributes derived from a digital elevation model, legacy data from soil survey and present day remote sensing. The results from this study demonstrated that a decision tree based on high topographic wetness indices, poor and very poor drainage classes and NDVI could be used to construct pre-European wetland extent for portions of the glaciated midwest.