メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.42119079094 43.0820572969832, 141.420796138042 43.0826564551515, 141.420511431992 43.0830922605045, 141.418880968227 43.0823104755636, 141.419061545151 43.0815930953298, 141.419126659419 43.0814180970849, 141.419418408485 43.08028334623, 141.419765061894 43.0804537352496, 141.42090138288 43.0810132078602, 141.421642987456 43.0813733863006, 141.421438145594 43.0816795930016, 141.42119079094 43.0820572969832)) ^^http://www.opengis.net/ont/geosparql#wktLiteral