proj4.defs("EPSG:9678","+proj=tmerc +lat_0=0 +lon_0=90 +k=0.9996 +x_0=500000 +y_0=-2000000 +ellps=evrst30 +towgs84=283.8,735.9,261.1,0,0,0,0 +units=m +no_defs +type=crs");