proj4.defs("EPSG:8170","+proj=lcc +lat_1=42.6375622769444 +lat_0=42.6375622769444 +lon_0=-89.8388888888889 +k_0=1.0000390487 +x_0=170078.74015748 +y_0=45830.2948437897 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=us-ft +no_defs +type=crs");