メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.324055044163 43.7657154931701, 142.324507480416 43.7658534336474, 142.323905754929 43.766893563348, 142.323885999732 43.7669366475567, 142.323414313545 43.7667933741146, 142.322827687381 43.7666214620887, 142.323151927042 43.7660728007253, 142.323455530408 43.765535911821, 142.324055044163 43.7657154931701)) ^^http://www.opengis.net/ont/geosparql#wktLiteral