メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.361529136529 43.7667700233932, 142.360082111226 43.7672184318974, 142.359513114463 43.7661505726855, 142.360969139679 43.7657125345886, 142.361529136529 43.7667700233932)) ^^http://www.opengis.net/ont/geosparql#wktLiteral