メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.0000000 35.2500000, 135.0062500 35.2500000, 135.0062500 35.2541667, 135.0000000 35.2541667, 135.0000000 35.2500000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral