メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.7250000 33.8000000, 133.7312500 33.8000000, 133.7312500 33.8041667, 133.7250000 33.8041667, 133.7250000 33.8000000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral