メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.38752818304 43.7829537793636, 142.386895855487 43.7834947104723, 142.385711573754 43.7814393357353, 142.385384211734 43.7810464947688, 142.38695211055 43.7805477005, 142.387168863727 43.7807982647093, 142.387855238497 43.7805821398674, 142.388304381065 43.781068533221, 142.388556892593 43.7812812548734, 142.388858464459 43.7815192862406, 142.389089838052 43.7816711853816, 142.388562307881 43.7821105593423, 142.388129137358 43.7824762788628, 142.387828647737 43.7827150299818, 142.38752818304 43.7829537793636)) ^^http://www.opengis.net/ont/geosparql#wktLiteral