メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.415178092437 35.9477450256674, 139.415066290695 35.9476635569926, 139.414793126613 35.9474396596843, 139.414922446509 35.9473489072096, 139.415001679857 35.9472985174961, 139.415072022681 35.9473595708823, 139.415207677132 35.9476505424805, 139.415178092437 35.9477450256674)) ^^http://www.opengis.net/ont/geosparql#wktLiteral