メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.347286424215 43.7613802395405, 142.347077900016 43.7615723946215, 142.346736289532 43.761377019518, 142.345558415291 43.7606138105178, 142.345876398769 43.7603827985783, 142.347010887449 43.7595216267458, 142.348525396962 43.7605577252788, 142.348148695716 43.760705728145, 142.347286424215 43.7613802395405)) ^^http://www.opengis.net/ont/geosparql#wktLiteral