メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.550096381027 43.245129672215, 143.548896928325 43.2451894629122, 143.548819764594 43.2442213405981, 143.550013442682 43.2441713916849, 143.550096381027 43.245129672215)) ^^http://www.opengis.net/ont/geosparql#wktLiteral