メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.277630036023 43.0972112139302, 141.276692727928 43.0977856434365, 141.275218646607 43.0965048709828, 141.27616935534 43.0959262769303, 141.277014358273 43.0954040245457, 141.277828800259 43.094889875557, 141.278416858288 43.0954017323925, 141.279308445068 43.0961777655679, 141.278475228986 43.0966833964581, 141.277630036023 43.0972112139302)) ^^http://www.opengis.net/ont/geosparql#wktLiteral