You will need the same dataset used in the Site Selection modules: http://linuxlab.sbs.umass.edu/beginning-fossgis-umass/datasets/lab_siteselection/siteselectiondata.zip (you probably have this one already) and a perimeter of the town of Amherst: http://linuxlab.sbs.umass.edu/beginning-fossgis-umass/datasets/lab_siteselection/amherst.zip. Download them to a temporary folder on your computer and extract into a directory (always make sure that there are no spaces in the path--this will be particularly important in this assignment, as you will be working in the GRASS shell, which is on a command line. In addition, you might want to create a directory that is easy to type!).