メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.8000000 34.3208334, 134.8062500 34.3208334, 134.8062500 34.3250000, 134.8000000 34.3250000, 134.8000000 34.3208334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral