proj4.defs("EPSG:3481","+proj=tmerc +lat_0=31 +lon_0=-110.166666666667 +k=0.9999 +x_0=213360 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=ft +no_defs +type=crs");