メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.4125000 35.3958334, 133.4187500 35.3958334, 133.4187500 35.4000000, 133.4125000 35.4000000, 133.4125000 35.3958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral