メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.322671428121 43.1123101107352, 141.32331508031 43.1129835082261, 141.322937524845 43.1131744066244, 141.322549909595 43.1133828747989, 141.321809828294 43.1137666879712, 141.321463271174 43.1134182864269, 141.321154636118 43.113108030512, 141.320816899867 43.1127672994356, 141.320459806932 43.1123992639376, 141.32084463354 43.1121972436583, 141.321177722084 43.1120139306662, 141.321514052329 43.1118321238812, 141.321535727875 43.1118206957302, 141.321949804458 43.1116012639505, 141.322671428121 43.1123101107352)) ^^http://www.opengis.net/ont/geosparql#wktLiteral