メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.0687500 34.7208334, 134.0750000 34.7208334, 134.0750000 34.7250000, 134.0687500 34.7250000, 134.0687500 34.7208334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral