メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.317418770696 42.2840184193529, 143.318012059733 42.2842663987218, 143.317526027598 42.2849347669104, 143.317487734267 42.2849783105686, 143.316883338392 42.2847235379863, 143.31615606801 42.2844170092757, 143.316187359456 42.2843739533288, 143.316699657416 42.2837178674491, 143.317418770696 42.2840184193529)) ^^http://www.opengis.net/ont/geosparql#wktLiteral