メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.280398873623 43.1510408864529, 141.28066511596 43.1512362644345, 141.282163181361 43.152354512267, 141.280909889875 43.1532525316082, 141.280527158268 43.1535167439951, 141.278774125392 43.1522073319691, 141.277958719601 43.1515711077735, 141.27791801495 43.1515393952381, 141.278318995914 43.1512630415209, 141.279537026775 43.1503833219575, 141.280398873623 43.1510408864529)) ^^http://www.opengis.net/ont/geosparql#wktLiteral