proj4.defs("EPSG:8521","+proj=tmerc +lat_0=37.5 +lon_0=-99.45 +k=1.000082 +x_0=1371602.74320549 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=us-ft +no_defs +type=crs");