メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.310579104179 43.0877860935124, 141.31045759174 43.0878572524104, 141.310481763103 43.08787672082, 141.310297619679 43.0879836551105, 141.309878979697 43.0882335385272, 141.309967304598 43.088305858937, 141.309725347106 43.0884409410213, 141.308705959702 43.0875473289089, 141.30895644261 43.0873943143675, 141.309276457567 43.087212193763, 141.309317497843 43.0871827119374, 141.309684901802 43.0869636348374, 141.310398851722 43.0876133617799, 141.310493611282 43.0877042312248, 141.310579104179 43.0877860935124)) ^^http://www.opengis.net/ont/geosparql#wktLiteral