proj4.defs("EPSG:29871","+proj=omerc +lat_0=4 +lonc=115 +alpha=53.3158204722222 +gamma=53.1301023611111 +k=0.99984 +x_0=590476.871463039 +y_0=442857.65309436 +ellps=evrstSS +towgs84=-533.4,669.2,-52.5,0,0,4.28,9.4 +to_meter=20.1167651215526 +no_defs +type=crs");