メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.6625000 34.8000000, 134.6687500 34.8000000, 134.6687500 34.8041667, 134.6625000 34.8041667, 134.6625000 34.8000000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral