メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.040104500021 37.9165135481043, 139.039752273919 37.9167960326548, 139.038948224003 37.9161235383598, 139.039114374131 37.9160138077281, 139.039319141291 37.9161913832498, 139.039508429502 37.9160445192191, 139.03956010695 37.9160822940617, 139.040104500021 37.9165135481043)) ^^http://www.opengis.net/ont/geosparql#wktLiteral