メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.385694285298 44.1687957487916, 142.386683713048 44.1691927465564, 142.386510466496 44.1698030921132, 142.38267298443 44.169187086994, 142.381854207074 44.1690434223345, 142.382351027984 44.1674541804136, 142.385694285298 44.1687957487916)) ^^http://www.opengis.net/ont/geosparql#wktLiteral