メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.106942557553 34.7048100644042, 138.103558013151 34.704634251509, 138.10360016837 34.7028145638631, 138.104204116893 34.7029714954167, 138.104473569432 34.7030298517559, 138.105038899663 34.7030676300008, 138.105256641195 34.7030252433235, 138.106749640104 34.7046792803217, 138.106942557553 34.7048100644042)) ^^http://www.opengis.net/ont/geosparql#wktLiteral