メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.3937500 35.4000000, 133.4000000 35.4000000, 133.4000000 35.4041667, 133.3937500 35.4041667, 133.3937500 35.4000000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral