メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.281788998478 43.1496313452772, 141.282374046985 43.1500692368314, 141.283861627631 43.151188639167, 141.283397071328 43.1514964050639, 141.282163181361 43.152354512267, 141.28066511596 43.1512362644345, 141.280398873623 43.1510408864529, 141.279537026775 43.1503833219575, 141.280298194492 43.1498387640605, 141.280784331178 43.1494783779296, 141.281202806013 43.1491873217415, 141.281788998478 43.1496313452772)) ^^http://www.opengis.net/ont/geosparql#wktLiteral