メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.785135262091 35.4127547381103, 136.782678829741 35.4128698048459, 136.782660305963 35.4124313834091, 136.785109826023 35.4123477021823, 136.78512322442 35.4125621022986, 136.785135262091 35.4127547381103)) ^^http://www.opengis.net/ont/geosparql#wktLiteral