メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.767110015639 43.2062646410187, 141.766774225023 43.2066202097048, 141.765821872681 43.2075893870068, 141.764995670166 43.2071561161495, 141.764905333321 43.2071087537426, 141.765835655425 43.2061484216901, 141.766131038531 43.2058151197572, 141.766149953731 43.2057938199235, 141.767110015639 43.2062646410187)) ^^http://www.opengis.net/ont/geosparql#wktLiteral