メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.627219159167 42.8362490157196, 141.626305679784 42.8365835350969, 141.626749167964 42.8362207145952, 141.62679195219 42.8361856404447, 141.627168980129 42.8358742210703, 141.627537950335 42.8355702117094, 141.628025562078 42.8351851199515, 141.628430284251 42.8357937283426, 141.627219159167 42.8362490157196)) ^^http://www.opengis.net/ont/geosparql#wktLiteral