メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.336829195106 43.1389839638439, 141.337044411419 43.1393521594718, 141.337260007806 43.1397208499114, 141.337657954077 43.1404017025395, 141.337717442162 43.1405605552678, 141.337878592426 43.1412590747141, 141.335978945349 43.1414966563094, 141.335616441707 43.1399328184372, 141.335340942026 43.1387701254732, 141.33565196954 43.1387271014841, 141.336657435973 43.1385932563137, 141.336829195106 43.1389839638439)) ^^http://www.opengis.net/ont/geosparql#wktLiteral