メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.041775548977 43.5755091110888, 142.040447915566 43.5739982540379, 142.040715065544 43.5738445045649, 142.042092038853 43.5753748184944, 142.041775548977 43.5755091110888)) ^^http://www.opengis.net/ont/geosparql#wktLiteral