メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.800571771145 35.4401116163421, 136.800075807994 35.4443107500421, 136.798512569373 35.4439873917356, 136.798621257365 35.4430039498735, 136.79872257256 35.4422311149345, 136.799010541015 35.4399418522349, 136.799153137978 35.4399573580464, 136.80020066623 35.4400684079357, 136.800571771145 35.4401116163421)) ^^http://www.opengis.net/ont/geosparql#wktLiteral