proj4.defs("EPSG:8173","+proj=tmerc +lat_0=44.0055555555556 +lon_0=-88.6333333333333 +k=1.0000673004 +x_0=275844.5533 +y_0=0.0157 +ellps=GRS80 +towgs84=-0.991,1.9072,0.5129,-1.25033e-07,-4.6785e-08,-5.6529e-08,0 +units=m +no_defs +type=crs");