メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.830690084344 34.6893247344243, 135.830396186983 34.6893362992034, 135.830114246919 34.689328159338, 135.830100635614 34.6893277184761, 135.829702097507 34.6893326557427, 135.829699342979 34.6890583956075, 135.830218847551 34.68904517413, 135.830688404756 34.6890494885768, 135.830690084344 34.6893247344243)) ^^http://www.opengis.net/ont/geosparql#wktLiteral