メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.768645476811 43.2060473935535, 141.768316952259 43.2064097487908, 141.768015137134 43.206736840335, 141.767110015639 43.2062646410187, 141.767406236581 43.2059583453907, 141.767724790364 43.2055992535633, 141.768645476811 43.2060473935535)) ^^http://www.opengis.net/ont/geosparql#wktLiteral