メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((145.574445502776 43.3282929066026, 145.573938700564 43.3286714779305, 145.573421277844 43.3290673728968, 145.573376121877 43.3290942114334, 145.57231448426 43.3282946091306, 145.572469025821 43.3281780049427, 145.572828125711 43.3279070558445, 145.573357272035 43.3275072365962, 145.573899662881 43.3279002991736, 145.574445502776 43.3282929066026)) ^^http://www.opengis.net/ont/geosparql#wktLiteral