メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.356126081018 43.7664757594909, 142.356336670553 43.7668521299089, 142.356438665826 43.7670421281782, 142.354962772183 43.7674679860909, 142.354643512736 43.766900178362, 142.354338903505 43.7663354317088, 142.355782791939 43.7659173476522, 142.356126081018 43.7664757594909)) ^^http://www.opengis.net/ont/geosparql#wktLiteral