proj4.defs("EPSG:8131","+proj=tmerc +lat_0=44.5555555555556 +lon_0=-90.4888888888889 +k=1.0000649554 +x_0=227990.8546 +y_0=0.0109 +ellps=GRS80 +towgs84=-0.9738,1.9453,0.5486,-1.3357e-07,-4.872e-08,-5.507e-08,0 +units=m +no_defs +type=crs");