The Biology Department turned to Dr. Forsythe for help in determining how best to study the local environmental effects of green roofs. I employed the use of Erdas Imagine on aerial photography to come up with an unsupervised land-use classification map that delineated a number of different land-surface types. This would allow them to choose an appropriate local diversity of locations across the city. We also helped set up their control study, measuring in situ surface properties such as temperature, thermal inertia, and humidity.