メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.110615979446 38.9208972966777, 141.110053816335 38.9207935501971, 141.109611632905 38.9201837602545, 141.10858182508 38.9187927209234, 141.108200127066 38.9182668187538, 141.108155822012 38.9181902081253, 141.111328132114 38.9188757432664, 141.110615979446 38.9208972966777)) ^^http://www.opengis.net/ont/geosparql#wktLiteral