メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.7625000 35.5458334, 135.7687500 35.5458334, 135.7687500 35.5500000, 135.7625000 35.5500000, 135.7625000 35.5458334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral