メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.975112385702 43.5475533768175, 144.974770500518 43.5478354934973, 144.974411981674 43.5475988091766, 144.974409987457 43.5475974499202, 144.974373116969 43.5475730497463, 144.974711627713 43.5473060982311, 144.974726522919 43.5473148490059, 144.975121649129 43.5469871622613, 144.975498538618 43.5472368009794, 144.975112385702 43.5475533768175)) ^^http://www.opengis.net/ont/geosparql#wktLiteral