メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.421103231654 34.0984860595332, 131.421084116091 34.0987251427069, 131.420031249438 34.0985250713867, 131.420043631711 34.0984549923414, 131.420107433092 34.0980933415878, 131.421119408364 34.0982827401689, 131.421103231654 34.0984860595332)) ^^http://www.opengis.net/ont/geosparql#wktLiteral